diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0dcf319f..059df8ca 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -26,8 +26,8 @@ jobs:
       matrix:
         icu_version: [74, 76, 77]
         feature_set:
-          - "renaming,icu_version_in_env,icu_version_64_plus,icu_version_67_plus,icu_version_68_plus"
-          - "renaming,icu_version_64_plus,icu_version_67_plus,icu_version_68_plus,icu_config,use-bindgen"
+          - "renaming,icu_version_in_env"
+          - "renaming,icu_config,use-bindgen"
     steps:
       - uses: actions/checkout@v6
       - name: 'Test ICU version ${{ matrix.icu_version }}'
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 0608aba7..548ce99d 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -32,6 +32,47 @@ term health of the repository.
 * Please keep PRs limited to a single topic of change. This makes the PR easier to
   review, and easier to roll back, if that becomes necessary.
 
+## Adding ICU-version-dependent code
+
+The workspace currently targets a range of ICU versions across which the
+wrapped APIs behave uniformly enough that no version-gated code is needed.
+Version gating has historically been required when ICU's behavior changes
+between versions in user-visible ways — for example, changes in locale
+data or fixes to behavioral bugs that cause the same input to produce
+different output across ICU versions. If a future change introduces this
+kind of difference, follow the pattern below — it must be wired up in
+**two** places that are kept in sync.
+
+### 1. The Cargo feature
+
+Declare a feature in each affected crate's `Cargo.toml`, named after the
+boundary version (e.g. `icu_version_78_plus`). Propagate it to dependent
+crates the same way `icu_version_in_env` is propagated.
+
+### 2. Automatic activation via `build.rs`
+
+A crate's `build.rs` may emit `cargo:rustc-cfg=feature="icu_version_XX_plus"`
+to activate the feature based on the ICU version detected at build time (via
+`pkg-config`). This makes `#[cfg(feature = "icu_version_XX_plus")]`-gated
+code light up automatically under the default feature set
+(`use-bindgen`, `icu_config`, `renaming`) without requiring users to pass
+`--features` manually.
+
+**Any crate that contains `#[cfg(feature = "icu_version_XX_plus")]`-gated
+code must have a `build.rs`** that emits the corresponding cfg. Without it,
+the gated code is silently excluded when building with default features,
+even if a matching ICU version is installed. Copy the build script from any
+crate that has one (e.g. `rust_icu_uloc`) and add the matching
+`[build-dependencies]` entry pointing at `rust_icu_release`.
+
+### Explicit activation (when `icu_config` is inactive)
+
+When `icu_config` is disabled (e.g. when using pre-generated static bindgen
+files with `icu_version_in_env`), the `build.rs` does not emit cfgs, so
+version features must be passed explicitly via
+`--features=icu_version_XX_plus,...`. The CI `test-with-features` matrix
+job is the right place to add coverage for that path.
+
 ## Community Guidelines
 
 This project follows [Google's Open Source Community
diff --git a/Makefile b/Makefile
index a9df9120..50ef78c5 100644
--- a/Makefile
+++ b/Makefile
@@ -104,11 +104,11 @@ macos-test:
 	    && PATH="$$ICU_PREFIX/bin:$$PATH" \
 	       PKG_CONFIG_PATH="$$ICU_PREFIX/lib/pkgconfig:$$PKG_CONFIG_PATH" \
 	       RUSTFLAGS="-L $$ICU_PREFIX/lib" \
-	       cargo test --no-default-features --features=use-bindgen,icu_config,renaming,icu_version_64_plus,icu_version_67_plus,icu_version_68_plus \
+	       cargo test \
 	    && PATH="$$ICU_PREFIX/bin:$$PATH" \
 	       PKG_CONFIG_PATH="$$ICU_PREFIX/lib/pkgconfig:$$PKG_CONFIG_PATH" \
 	       RUSTFLAGS="-L $$ICU_PREFIX/lib" \
-	       cargo test --no-default-features --features=use-bindgen,icu_config,renaming,icu_version_64_plus,icu_version_67_plus,icu_version_68_plus,static
+	       cargo test --features=static
 .PHONY: macos-test
 
 # Refreshes the static bindgen output (contents of ./rust_icu_sys/bindgen) based
diff --git a/rust_icu/Cargo.toml b/rust_icu/Cargo.toml
index 15bd1b33..86d2bb06 100644
--- a/rust_icu/Cargo.toml
+++ b/rust_icu/Cargo.toml
@@ -116,82 +116,6 @@ icu_version_in_env = [
   "rust_icu_utext/icu_version_in_env",
   "rust_icu_utrans/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_ubrk/icu_version_64_plus",
-  "rust_icu_ucal/icu_version_64_plus",
-  "rust_icu_ucol/icu_version_64_plus",
-  "rust_icu_ucsdet/icu_version_64_plus",
-  "rust_icu_udat/icu_version_64_plus",
-  "rust_icu_udata/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_ulistformatter/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_umsg/icu_version_64_plus",
-  "rust_icu_unorm2/icu_version_64_plus",
-  "rust_icu_ures/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-  "rust_icu_utext/icu_version_64_plus",
-  "rust_icu_utrans/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_ubrk/icu_version_67_plus",
-  "rust_icu_ucal/icu_version_67_plus",
-  "rust_icu_ucol/icu_version_67_plus",
-  "rust_icu_ucsdet/icu_version_67_plus",
-  "rust_icu_udat/icu_version_67_plus",
-  "rust_icu_udata/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_ulistformatter/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_umsg/icu_version_67_plus",
-  "rust_icu_unorm2/icu_version_67_plus",
-  "rust_icu_ures/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-  "rust_icu_utext/icu_version_67_plus",
-  "rust_icu_utrans/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_ubrk/icu_version_68_plus",
-  "rust_icu_ucal/icu_version_68_plus",
-  "rust_icu_ucol/icu_version_68_plus",
-  "rust_icu_ucsdet/icu_version_68_plus",
-  "rust_icu_udat/icu_version_68_plus",
-  "rust_icu_udata/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_ulistformatter/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_umsg/icu_version_68_plus",
-  "rust_icu_unorm2/icu_version_68_plus",
-  "rust_icu_ures/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-  "rust_icu_utext/icu_version_68_plus",
-  "rust_icu_utrans/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_ubrk/icu_version_69_max",
-  "rust_icu_ucal/icu_version_69_max",
-  "rust_icu_ucol/icu_version_69_max",
-  "rust_icu_ucsdet/icu_version_69_max",
-  "rust_icu_udat/icu_version_69_max",
-  "rust_icu_udata/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_ulistformatter/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_umsg/icu_version_69_max",
-  "rust_icu_unorm2/icu_version_69_max",
-  "rust_icu_ures/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-  "rust_icu_utext/icu_version_69_max",
-  "rust_icu_utrans/icu_version_69_max",
-]
 static = ["rust_icu_sys/static"]
 
 [badges]
diff --git a/rust_icu_common/Cargo.toml b/rust_icu_common/Cargo.toml
index 1f4ed7d2..2689fc49 100644
--- a/rust_icu_common/Cargo.toml
+++ b/rust_icu_common/Cargo.toml
@@ -28,18 +28,6 @@ use-bindgen = ["rust_icu_sys/use-bindgen"]
 renaming = ["rust_icu_sys/renaming"]
 icu_config = ["rust_icu_sys/icu_config"]
 icu_version_in_env = ["rust_icu_sys/icu_version_in_env"]
-icu_version_64_plus = [
-  "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_sys/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ecma402/Cargo.toml b/rust_icu_ecma402/Cargo.toml
index 64f83449..8663f813 100644
--- a/rust_icu_ecma402/Cargo.toml
+++ b/rust_icu_ecma402/Cargo.toml
@@ -74,46 +74,6 @@ icu_version_in_env = [
   "rust_icu_upluralrules/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_ulistformatter/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_unum/icu_version_64_plus",
-  "rust_icu_unumberformatter/icu_version_64_plus",
-  "rust_icu_upluralrules/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_ulistformatter/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_unum/icu_version_67_plus",
-  "rust_icu_unumberformatter/icu_version_67_plus",
-  "rust_icu_upluralrules/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_ulistformatter/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_unum/icu_version_68_plus",
-  "rust_icu_unumberformatter/icu_version_68_plus",
-  "rust_icu_upluralrules/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_ulistformatter/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_unum/icu_version_69_max",
-  "rust_icu_unumberformatter/icu_version_69_max",
-  "rust_icu_upluralrules/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ecma402/src/datetimeformat.rs b/rust_icu_ecma402/src/datetimeformat.rs
index aaa5a191..000187bb 100644
--- a/rust_icu_ecma402/src/datetimeformat.rs
+++ b/rust_icu_ecma402/src/datetimeformat.rs
@@ -285,12 +285,6 @@ mod testing {
                 dates: vec![10000_f64],
                 expected_regex: vec!["1970."],
             },
-            // In ICU 63 this gets reported as "GMT-08:00", likely the ICU data
-            // from then didn't contain the Serbian long spellout of the "uslax"
-            // time zone.  Turning on from 67 onwards, since at the time this
-            // test was written that was the oldest version that did have the
-            // long spellout.
-            #[cfg(feature="icu_version_67_plus")]
             TestCase {
                 locale: "sr",
                 opts: DateTimeFormatOptions{
diff --git a/rust_icu_ecma402/src/listformat.rs b/rust_icu_ecma402/src/listformat.rs
index ac3aba22..0b2d5cc3 100644
--- a/rust_icu_ecma402/src/listformat.rs
+++ b/rust_icu_ecma402/src/listformat.rs
@@ -26,8 +26,6 @@ pub struct Format {
     rep: ulfmt::UListFormatter,
 }
 
-// Full support for styled formatting is available since v67.
-#[cfg(feature = "icu_version_67_plus")]
 pub(crate) mod internal {
     use ecma402_traits::listformat::options;
     use rust_icu_sys as usys;
@@ -60,24 +58,13 @@ impl listformat::Format for Format {
     /// Creates a new [Format], from a [ecma402_traits::Locale] and [listformat::Options].
     fn try_new<L: ecma402_traits::Locale>(
         l: L,
-        _opts: listformat::Options,
+        opts: listformat::Options,
     ) -> Result<Format, Self::Error> {
         let locale = format!("{}", l);
-
-        #[cfg(feature = "icu_version_67_plus")]
-        {
-            let width = internal::to_icu_width(&_opts.style);
-            let in_type = internal::to_icu_type(&_opts.in_type);
-            let rep = ulfmt::UListFormatter::try_new_styled(&locale, in_type, width)?;
-            Ok(Format { rep })
-        }
-
-        // The non-v67 implementation is less featureful.
-        #[cfg(not(feature = "icu_version_67_plus"))]
-        {
-            let rep = ulfmt::UListFormatter::try_new(&locale)?;
-            Ok(Format { rep })
-        }
+        let width = internal::to_icu_width(&opts.style);
+        let in_type = internal::to_icu_type(&opts.in_type);
+        let rep = ulfmt::UListFormatter::try_new_styled(&locale, in_type, width)?;
+        Ok(Format { rep })
     }
 
     /// Formats the given string.
@@ -123,7 +110,6 @@ mod testing {
                 opts: listformat::Options::default(),
                 expected: "eenie, meenie, minie, and moe",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "en-US",
                 array: vec!["eenie", "meenie", "minie", "moe"],
@@ -133,7 +119,6 @@ mod testing {
                 },
                 expected: "eenie, meenie, minie, & moe",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "en-US",
                 array: vec!["eenie", "meenie", "minie", "moe"],
@@ -143,7 +128,6 @@ mod testing {
                 },
                 expected: "eenie, meenie, minie, or moe",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "en-US",
                 array: vec!["eenie", "meenie", "minie", "moe"],
@@ -153,7 +137,6 @@ mod testing {
                 },
                 expected: "eenie, meenie, minie, moe",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "en-US",
                 array: vec!["eenie", "meenie", "minie", "moe"],
@@ -172,7 +155,6 @@ mod testing {
                 },
                 expected: "eenie, meenie, minie, and moe",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "en-US",
                 array: vec!["eenie", "meenie", "minie", "moe"],
@@ -193,7 +175,6 @@ mod testing {
                 },
                 expected: "Раја, Гаја и Влаја",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "sr-RS",
                 array: vec!["Раја", "Гаја", "Влаја"],
@@ -203,7 +184,6 @@ mod testing {
                 },
                 expected: "Раја, Гаја или Влаја",
             },
-            #[cfg(feature = "icu_version_67_plus")]
             TestCase {
                 locale: "sr-RS",
                 array: vec!["Раја", "Гаја", "Влаја"],
diff --git a/rust_icu_ecma402/src/numberformat.rs b/rust_icu_ecma402/src/numberformat.rs
index 05591388..a9b07cd4 100644
--- a/rust_icu_ecma402/src/numberformat.rs
+++ b/rust_icu_ecma402/src/numberformat.rs
@@ -175,10 +175,7 @@ pub(crate) mod internal {
     // 3 -> "integer-width/*000"
     fn integer_digits(digits: usize) -> String {
         let zeroes: String = std::iter::repeat("0").take(digits).collect();
-        #[cfg(feature = "icu_version_67_plus")]
-        return format!("integer-width/*{}", zeroes);
-        #[cfg(not(feature = "icu_version_67_plus"))]
-        return format!("integer-width/+{}", zeroes);
+        format!("integer-width/*{}", zeroes)
     }
 
     fn fraction_digits(min: usize, max: usize, min_sig: usize, max_sig: usize) -> String {
diff --git a/rust_icu_intl/Cargo.toml b/rust_icu_intl/Cargo.toml
index 1da7b256..0801d5c5 100644
--- a/rust_icu_intl/Cargo.toml
+++ b/rust_icu_intl/Cargo.toml
@@ -56,31 +56,3 @@ icu_version_in_env = [
   "rust_icu_umsg/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_umsg/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_umsg/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_umsg/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_umsg/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
diff --git a/rust_icu_release/Cargo.toml b/rust_icu_release/Cargo.toml
index f8113edd..84c59ba2 100644
--- a/rust_icu_release/Cargo.toml
+++ b/rust_icu_release/Cargo.toml
@@ -27,14 +27,6 @@ icu_config = [
 ]
 icu_version_in_env = [
 ]
-icu_version_64_plus = [
-]
-icu_version_67_plus = [
-]
-icu_version_68_plus = [
-]
-icu_version_69_max = [
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_release/src/lib.rs b/rust_icu_release/src/lib.rs
index 99c1018c..d2a30e7e 100644
--- a/rust_icu_release/src/lib.rs
+++ b/rust_icu_release/src/lib.rs
@@ -134,21 +134,6 @@ pub fn run() -> Result<()> {
 
     let icu_major_version = ICUConfig::version_major_int().context("while getting version")?;
     println!("icu-major-version: {}", icu_major_version);
-    if icu_major_version >= 64 {
-        println!("cargo:rustc-cfg=feature=\"icu_version_64_plus\"");
-    }
-    if icu_major_version >= 67 {
-        println!("cargo:rustc-cfg=feature=\"icu_version_67_plus\"");
-    }
-    if icu_major_version >= 68 {
-        println!("cargo:rustc-cfg=feature=\"icu_version_68_plus\"");
-    }
-    // Starting from version 69, the feature flags depending on the version
-    // number work for up to a certain version, so that they can be retired
-    // over time.
-    if icu_major_version <= 69 {
-        println!("cargo:rustc-cfg=feature=\"icu_version_69_max\"");
-    }
     println!("done");
     Ok(())
 }
diff --git a/rust_icu_sys/Cargo.toml b/rust_icu_sys/Cargo.toml
index 2db5d356..0c50ba8a 100644
--- a/rust_icu_sys/Cargo.toml
+++ b/rust_icu_sys/Cargo.toml
@@ -39,10 +39,6 @@ use-bindgen = ["bindgen"]
 renaming = []
 icu_config = []
 icu_version_in_env = []
-icu_version_64_plus = []
-icu_version_67_plus = []
-icu_version_68_plus = []
-icu_version_69_max = []
 static = []
 
 
diff --git a/rust_icu_sys/build.rs b/rust_icu_sys/build.rs
index 3e1d782c..5ce5c114 100644
--- a/rust_icu_sys/build.rs
+++ b/rust_icu_sys/build.rs
@@ -375,21 +375,6 @@ macro_rules! versioned_function {
         }
         let icu_major_version = ICUConfig::version_major_int()?;
         println!("icu-version-major: {}", icu_major_version);
-        if icu_major_version >= 64 {
-            println!("cargo:rustc-cfg=feature=\"icu_version_64_plus\"");
-        }
-        if icu_major_version >= 67 {
-            println!("cargo:rustc-cfg=feature=\"icu_version_67_plus\"");
-        }
-        if icu_major_version >= 68 {
-            println!("cargo:rustc-cfg=feature=\"icu_version_68_plus\"");
-        }
-        // Starting from version 69, the feature flags depending on the version
-        // number work for up to a certain version, so that they can be retired
-        // over time.
-        if icu_major_version <= 69 {
-            println!("cargo:rustc-cfg=feature=\"icu_version_69_max\"");
-        }
         Ok(())
     }
 
diff --git a/rust_icu_ubrk/Cargo.toml b/rust_icu_ubrk/Cargo.toml
index 5070190e..6c537d6c 100644
--- a/rust_icu_ubrk/Cargo.toml
+++ b/rust_icu_ubrk/Cargo.toml
@@ -35,18 +35,6 @@ icu_config = [
   "rust_icu_uloc/icu_config",
   "rust_icu_ustring/icu_config",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
 icu_version_in_env = [
   "rust_icu_common/icu_version_in_env",
   "rust_icu_sys/icu_version_in_env",
@@ -65,18 +53,6 @@ use-bindgen = [
   "rust_icu_uloc/use-bindgen",
   "rust_icu_ustring/use-bindgen",
 ]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 is-it-maintained-issue-resolution = { repository = "google/rust_icu" }
diff --git a/rust_icu_ucal/Cargo.toml b/rust_icu_ucal/Cargo.toml
index e5ad4f5b..9e25b244 100644
--- a/rust_icu_ucal/Cargo.toml
+++ b/rust_icu_ucal/Cargo.toml
@@ -55,30 +55,6 @@ icu_version_in_env = [
   "rust_icu_uenum/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_uchar/Cargo.toml b/rust_icu_uchar/Cargo.toml
index 9b9236b0..65d407a3 100644
--- a/rust_icu_uchar/Cargo.toml
+++ b/rust_icu_uchar/Cargo.toml
@@ -29,20 +29,4 @@ use-bindgen = ["rust_icu_sys/use-bindgen", "rust_icu_common/use-bindgen"]
 renaming = ["rust_icu_sys/renaming", "rust_icu_common/renaming"]
 icu_config = ["rust_icu_sys/icu_config", "rust_icu_common/icu_config"]
 icu_version_in_env = ["rust_icu_sys/icu_version_in_env", "rust_icu_common/icu_version_in_env"]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-]
 
diff --git a/rust_icu_ucnv/Cargo.toml b/rust_icu_ucnv/Cargo.toml
index 25ac8f0a..9b5489cc 100644
--- a/rust_icu_ucnv/Cargo.toml
+++ b/rust_icu_ucnv/Cargo.toml
@@ -41,22 +41,6 @@ icu_version_in_env = [
     "rust_icu_sys/icu_version_in_env",
     "rust_icu_common/icu_version_in_env",
 ]
-icu_version_64_plus = [
-    "rust_icu_common/icu_version_64_plus",
-    "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-    "rust_icu_common/icu_version_67_plus",
-    "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-    "rust_icu_common/icu_version_68_plus",
-    "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-    "rust_icu_common/icu_version_69_max",
-    "rust_icu_sys/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ucol/Cargo.toml b/rust_icu_ucol/Cargo.toml
index a2fa3bfe..04aa1f8a 100644
--- a/rust_icu_ucol/Cargo.toml
+++ b/rust_icu_ucol/Cargo.toml
@@ -54,30 +54,6 @@ icu_version_in_env = [
   "rust_icu_uenum/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ucsdet/Cargo.toml b/rust_icu_ucsdet/Cargo.toml
index 2e334c1f..dbe0797f 100644
--- a/rust_icu_ucsdet/Cargo.toml
+++ b/rust_icu_ucsdet/Cargo.toml
@@ -44,26 +44,6 @@ icu_version_in_env = [
     "rust_icu_common/icu_version_in_env",
     "rust_icu_uenum/icu_version_in_env",
 ]
-icu_version_64_plus = [
-    "rust_icu_common/icu_version_64_plus",
-    "rust_icu_sys/icu_version_64_plus",
-    "rust_icu_uenum/icu_version_64_plus",
-]
-icu_version_67_plus = [
-    "rust_icu_common/icu_version_67_plus",
-    "rust_icu_sys/icu_version_67_plus",
-    "rust_icu_uenum/icu_version_67_plus",
-]
-icu_version_68_plus = [
-    "rust_icu_common/icu_version_68_plus",
-    "rust_icu_sys/icu_version_68_plus",
-    "rust_icu_uenum/icu_version_68_plus",
-]
-icu_version_69_max = [
-    "rust_icu_common/icu_version_69_max",
-    "rust_icu_sys/icu_version_69_max",
-    "rust_icu_uenum/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_udat/Cargo.toml b/rust_icu_udat/Cargo.toml
index b55fb062..c5b36a4f 100644
--- a/rust_icu_udat/Cargo.toml
+++ b/rust_icu_udat/Cargo.toml
@@ -69,38 +69,6 @@ icu_version_in_env = [
   "rust_icu_uloc/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_ucal/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_ucal/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_ucal/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_ucal/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_udata/Cargo.toml b/rust_icu_udata/Cargo.toml
index 552c7ec1..d4aec3ea 100644
--- a/rust_icu_udata/Cargo.toml
+++ b/rust_icu_udata/Cargo.toml
@@ -29,22 +29,6 @@ use-bindgen = ["rust_icu_sys/use-bindgen", "rust_icu_common/use-bindgen"]
 renaming = ["rust_icu_sys/renaming", "rust_icu_common/renaming"]
 icu_config = ["rust_icu_sys/icu_config", "rust_icu_common/icu_config"]
 icu_version_in_env = ["rust_icu_sys/icu_version_in_env", "rust_icu_common/icu_version_in_env"]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_uenum/Cargo.toml b/rust_icu_uenum/Cargo.toml
index 2a642ee0..8a7b4005 100644
--- a/rust_icu_uenum/Cargo.toml
+++ b/rust_icu_uenum/Cargo.toml
@@ -28,22 +28,6 @@ use-bindgen = ["rust_icu_sys/use-bindgen", "rust_icu_common/use-bindgen"]
 renaming = ["rust_icu_sys/renaming", "rust_icu_common/renaming"]
 icu_config = ["rust_icu_sys/icu_config", "rust_icu_common/icu_config"]
 icu_version_in_env = ["rust_icu_sys/icu_version_in_env", "rust_icu_common/icu_version_in_env"]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_uformattable/Cargo.toml b/rust_icu_uformattable/Cargo.toml
index 93a2bbbf..5285ac96 100644
--- a/rust_icu_uformattable/Cargo.toml
+++ b/rust_icu_uformattable/Cargo.toml
@@ -49,26 +49,6 @@ icu_version_in_env = [
   "rust_icu_sys/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ulistformatter/Cargo.toml b/rust_icu_ulistformatter/Cargo.toml
index 214e84f1..984b14b2 100644
--- a/rust_icu_ulistformatter/Cargo.toml
+++ b/rust_icu_ulistformatter/Cargo.toml
@@ -49,26 +49,6 @@ icu_version_in_env = [
   "rust_icu_sys/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ulistformatter/src/lib.rs b/rust_icu_ulistformatter/src/lib.rs
index c493e632..e1138226 100644
--- a/rust_icu_ulistformatter/src/lib.rs
+++ b/rust_icu_ulistformatter/src/lib.rs
@@ -66,7 +66,6 @@ impl UListFormatter {
     }
 
     /// Implements `ulistfmt_openForType`.  Since ICU 67.
-    #[cfg(feature = "icu_version_67_plus")]
     pub fn try_new_styled(
         locale: &str,
         format_type: sys::UListFormatterType,
@@ -292,7 +291,6 @@ mod testing {
     }
 
     #[test]
-    #[cfg(feature = "icu_version_67_plus")]
     fn test_formatting_styled() {
         let array = ["Kwik", "Kwek", "Kwak"];
         let formatter = crate::UListFormatter::try_new_styled(
diff --git a/rust_icu_uloc/Cargo.toml b/rust_icu_uloc/Cargo.toml
index 8a0b44d2..3bd1d7dd 100644
--- a/rust_icu_uloc/Cargo.toml
+++ b/rust_icu_uloc/Cargo.toml
@@ -54,30 +54,6 @@ icu_version_in_env = [
   "rust_icu_uenum/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [build-dependencies]
 anyhow = "1.0"
diff --git a/rust_icu_uloc/src/lib.rs b/rust_icu_uloc/src/lib.rs
index 2a60c109..87363b3d 100644
--- a/rust_icu_uloc/src/lib.rs
+++ b/rust_icu_uloc/src/lib.rs
@@ -395,7 +395,6 @@ impl ULoc {
     }
 
     /// Implements `uloc_openAvailableByType`.
-    #[cfg(feature = "icu_version_67_plus")]
     pub fn open_available_by_type(locale_type: ULocAvailableType) -> Result<Enumeration, common::Error> {
         let mut status = common::Error::OK_CODE;
         unsafe {
@@ -406,7 +405,6 @@ impl ULoc {
     }
 
     /// Returns a vector of locales of the requested type.
-    #[cfg(feature = "icu_version_67_plus")]
     pub fn get_available_locales_by_type(locale_type: ULocAvailableType) -> Vec<ULoc> {
         if locale_type == ULocAvailableType::ULOC_AVAILABLE_COUNT {
             panic!("ULOC_AVAILABLE_COUNT is for internal use only");
@@ -829,7 +827,6 @@ mod tests {
 
     // This test yields a different result in ICU versions prior to 64:
     // "zh-Latn@collation=pinyin".
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_variant() -> Result<(), Error> {
         let loc = ULoc::try_from("zh-Latn-pinyin")?;
@@ -849,7 +846,6 @@ mod tests {
         Ok(())
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_name() -> Result<(), Error> {
         let loc = ULoc::try_from("en-US")?;
@@ -1034,34 +1030,6 @@ mod tests {
         );
     }
 
-    // This tests verifies buggy behavior which is fixed since ICU version 67.1
-    #[cfg(not(feature = "icu_version_67_plus"))]
-    #[test]
-    fn test_accept_language_exact_match() {
-        let accept_list: Result<Vec<_>, _> = vec!["es_ES", "ar_EG", "fr_FR"]
-            .into_iter()
-            .map(ULoc::try_from)
-            .collect();
-        let accept_list = accept_list.expect("make accept_list");
-
-        let available_locales: Result<Vec<_>, _> = vec!["de_DE", "en_US", "es_MX", "ar_EG"]
-            .into_iter()
-            .map(ULoc::try_from)
-            .collect();
-        let available_locales = available_locales.expect("make available_locales");
-
-        let actual = accept_language(accept_list, available_locales).expect("call accept_language");
-        assert_eq!(
-            actual,
-            (
-                // "es_MX" should be preferred as a fallback over exact match "ar_EG".
-                ULoc::try_from("ar_EG").ok(),
-                UAcceptResult::ULOC_ACCEPT_VALID
-            )
-        );
-    }
-
-    #[cfg(feature = "icu_version_67_plus")]
     #[test]
     fn test_accept_language_exact_match() {
         let accept_list: Result<Vec<_>, _> = vec!["es_ES", "ar_EG", "fr_FR"]
@@ -1216,7 +1184,6 @@ mod tests {
         assert_eq!(ULoc::for_language_tag("sr-u-tz-uslax").unwrap(), loc);
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_for_language_error() {
         let loc = ULoc::for_language_tag("en_US").unwrap();
@@ -1224,7 +1191,6 @@ mod tests {
         assert_eq!(loc.country(), None);
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_iso3_language() {
         let loc = ULoc::for_language_tag("en-US").unwrap();
@@ -1235,7 +1201,6 @@ mod tests {
         assert_eq!(iso_lang, None);
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_iso3_country() {
         let loc = ULoc::for_language_tag("en-US").unwrap();
@@ -1246,7 +1211,6 @@ mod tests {
         assert_eq!(iso_country, None);
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_display_language() {
         let english_locale = ULoc::for_language_tag("en").unwrap();
@@ -1260,7 +1224,6 @@ mod tests {
         assert_eq!(root_locale.display_language(&french_locale).unwrap().as_string_debug(), "langue indéterminée");
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_display_script() {
         let english_latin_locale = ULoc::for_language_tag("en-latg").unwrap();
@@ -1301,7 +1264,6 @@ mod tests {
         assert_eq!(calendar_value_in_french.unwrap().as_string_debug(), "calendrier hébraïque");
     }
 
-    #[cfg(feature = "icu_version_64_plus")]
     #[test]
     fn test_display_name() {
         let loc = ULoc::for_language_tag("az-Cyrl-AZ-u-ca-hebrew-t-it-x-whatever").unwrap();
@@ -1345,7 +1307,6 @@ mod tests {
         assert!(locale.is_ok());
     }
 
-    #[cfg(feature = "icu_version_67_plus")]
     #[test]
     fn test_get_available_locales_by_type() {
         let locales1 = ULoc::get_available_locales_by_type(ULocAvailableType::ULOC_AVAILABLE_DEFAULT);
@@ -1371,14 +1332,12 @@ mod tests {
         assert!(alias_locales.contains(&ULoc::try_from("ars").unwrap()));
     }
 
-    #[cfg(feature = "icu_version_67_plus")]
     #[test]
     #[should_panic(expected = "ULOC_AVAILABLE_COUNT is for internal use only")]
     fn test_get_available_locales_by_type_panic() {
         ULoc::get_available_locales_by_type(ULocAvailableType::ULOC_AVAILABLE_COUNT);
     }
 
-    #[cfg(feature = "icu_version_67_plus")]
     #[test]
     fn test_get_available_locales_by_type_error() {
         assert!(!ULoc::open_available_by_type(ULocAvailableType::ULOC_AVAILABLE_COUNT).is_ok());
diff --git a/rust_icu_umsg/Cargo.toml b/rust_icu_umsg/Cargo.toml
index c94e749a..60831483 100644
--- a/rust_icu_umsg/Cargo.toml
+++ b/rust_icu_umsg/Cargo.toml
@@ -56,30 +56,6 @@ icu_version_in_env = [
   "rust_icu_uloc/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_unorm2/Cargo.toml b/rust_icu_unorm2/Cargo.toml
index 2da39a0a..e9f24b45 100644
--- a/rust_icu_unorm2/Cargo.toml
+++ b/rust_icu_unorm2/Cargo.toml
@@ -67,38 +67,6 @@ icu_version_in_env = [
   "rust_icu_uloc/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_ucal/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_ucal/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_ucal/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_ucal/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_unum/Cargo.toml b/rust_icu_unum/Cargo.toml
index c875b244..b1a63383 100644
--- a/rust_icu_unum/Cargo.toml
+++ b/rust_icu_unum/Cargo.toml
@@ -59,34 +59,6 @@ icu_version_in_env = [
   "rust_icu_uloc/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uformattable/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uformattable/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uformattable/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uformattable/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_unumberformatter/Cargo.toml b/rust_icu_unumberformatter/Cargo.toml
index 1ec150cf..35b9cd22 100644
--- a/rust_icu_unumberformatter/Cargo.toml
+++ b/rust_icu_unumberformatter/Cargo.toml
@@ -64,38 +64,6 @@ icu_version_in_env = [
   "rust_icu_unum/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uformattable/icu_version_64_plus",
-  "rust_icu_uloc/icu_version_64_plus",
-  "rust_icu_unum/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uformattable/icu_version_67_plus",
-  "rust_icu_uloc/icu_version_67_plus",
-  "rust_icu_unum/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uformattable/icu_version_68_plus",
-  "rust_icu_uloc/icu_version_68_plus",
-  "rust_icu_unum/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uformattable/icu_version_69_max",
-  "rust_icu_uloc/icu_version_69_max",
-  "rust_icu_unum/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_unumberformatter/src/lib.rs b/rust_icu_unumberformatter/src/lib.rs
index 45965089..1d7ed58e 100644
--- a/rust_icu_unumberformatter/src/lib.rs
+++ b/rust_icu_unumberformatter/src/lib.rs
@@ -72,47 +72,25 @@ impl UNumberFormatter {
     ) -> Result<UNumberFormatter, common::Error> {
         let mut status = sys::UErrorCode::U_ZERO_ERROR;
 
-        // Uses the "with error" flavor of the constructor for ICU versions upwards of
-        // 64.  This allows more elaborate error messages in case of an issue.
-        #[cfg(feature = "icu_version_64_plus")]
-        {
-            let mut parse_status = common::NO_PARSE_ERROR.clone();
-            let rep = unsafe {
-                assert!(common::Error::is_ok(status));
-                versioned_function!(unumf_openForSkeletonAndLocaleWithError)(
-                    skeleton.as_c_ptr(),
-                    skeleton.len() as i32,
-                    locale.label().as_ptr() as *const std::os::raw::c_char,
-                    &mut parse_status,
-                    &mut status,
-                )
-            };
-            assert_ne!(rep, 0 as *mut sys::UNumberFormatter);
-            common::parse_ok(parse_status)?;
-            common::Error::ok_or_warning(status)?;
-            let result = UNumberFormatter {
-                rep: std::ptr::NonNull::new(rep).unwrap(),
-            };
-            return Ok(result);
-        }
-        #[cfg(not(feature = "icu_version_64_plus"))]
-        {
-            let rep = unsafe {
-                assert!(common::Error::is_ok(status));
-                versioned_function!(unumf_openForSkeletonAndLocale)(
-                    skeleton.as_c_ptr(),
-                    skeleton.len() as i32,
-                    locale.label().as_ptr() as *const std::os::raw::c_char,
-                    &mut status,
-                )
-            };
-            assert_ne!(rep, 0 as *mut sys::UNumberFormatter);
-            common::Error::ok_or_warning(status)?;
-            let result = UNumberFormatter {
-                rep: std::ptr::NonNull::new(rep).unwrap(),
-            };
-            return Ok(result);
-        }
+        // Uses the "with error" flavor of the constructor, which allows more
+        // elaborate error messages in case of an issue.
+        let mut parse_status = common::NO_PARSE_ERROR.clone();
+        let rep = unsafe {
+            assert!(common::Error::is_ok(status));
+            versioned_function!(unumf_openForSkeletonAndLocaleWithError)(
+                skeleton.as_c_ptr(),
+                skeleton.len() as i32,
+                locale.label().as_ptr() as *const std::os::raw::c_char,
+                &mut parse_status,
+                &mut status,
+            )
+        };
+        assert_ne!(rep, 0 as *mut sys::UNumberFormatter);
+        common::parse_ok(parse_status)?;
+        common::Error::ok_or_warning(status)?;
+        Ok(UNumberFormatter {
+            rep: std::ptr::NonNull::new(rep).unwrap(),
+        })
     }
 
     /// Similar to [UNumberFormatter::try_new_ustring] but uses Rust types.
diff --git a/rust_icu_upluralrules/Cargo.toml b/rust_icu_upluralrules/Cargo.toml
index 96852fc0..1bdebc22 100644
--- a/rust_icu_upluralrules/Cargo.toml
+++ b/rust_icu_upluralrules/Cargo.toml
@@ -54,30 +54,6 @@ icu_version_in_env = [
   "rust_icu_uenum/icu_version_in_env",
   "rust_icu_ustring/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ures/Cargo.toml b/rust_icu_ures/Cargo.toml
index 7231553b..bd46aa87 100644
--- a/rust_icu_ures/Cargo.toml
+++ b/rust_icu_ures/Cargo.toml
@@ -46,26 +46,6 @@ icu_version_in_env = [
   "rust_icu_common/icu_version_in_env",
   "rust_icu_uenum/icu_version_in_env",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_ustring/Cargo.toml b/rust_icu_ustring/Cargo.toml
index 77ffdddb..bfa5fb6d 100644
--- a/rust_icu_ustring/Cargo.toml
+++ b/rust_icu_ustring/Cargo.toml
@@ -29,21 +29,5 @@ use-bindgen = ["rust_icu_sys/use-bindgen", "rust_icu_common/use-bindgen"]
 renaming = ["rust_icu_sys/renaming", "rust_icu_common/renaming"]
 icu_config = ["rust_icu_sys/icu_config", "rust_icu_common/icu_config"]
 icu_version_in_env = ["rust_icu_sys/icu_version_in_env", "rust_icu_common/icu_version_in_env"]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-]
 
 
diff --git a/rust_icu_utext/Cargo.toml b/rust_icu_utext/Cargo.toml
index f28e21da..f41c38c4 100644
--- a/rust_icu_utext/Cargo.toml
+++ b/rust_icu_utext/Cargo.toml
@@ -28,22 +28,6 @@ use-bindgen = ["rust_icu_sys/use-bindgen", "rust_icu_common/use-bindgen"]
 renaming = ["rust_icu_sys/renaming", "rust_icu_common/renaming"]
 icu_config = ["rust_icu_sys/icu_config", "rust_icu_common/icu_config"]
 icu_version_in_env = ["rust_icu_sys/icu_version_in_env", "rust_icu_common/icu_version_in_env"]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-]
 
 [badges]
 maintenance = { status = "actively-developed" }
diff --git a/rust_icu_utrans/Cargo.toml b/rust_icu_utrans/Cargo.toml
index 0c6e7ca7..2fe7c6bb 100644
--- a/rust_icu_utrans/Cargo.toml
+++ b/rust_icu_utrans/Cargo.toml
@@ -36,18 +36,6 @@ icu_config = [
   "rust_icu_uenum/icu_config",
   "rust_icu_ustring/icu_config",
 ]
-icu_version_64_plus = [
-  "rust_icu_common/icu_version_64_plus",
-  "rust_icu_sys/icu_version_64_plus",
-  "rust_icu_uenum/icu_version_64_plus",
-  "rust_icu_ustring/icu_version_64_plus",
-]
-icu_version_67_plus = [
-  "rust_icu_common/icu_version_67_plus",
-  "rust_icu_sys/icu_version_67_plus",
-  "rust_icu_uenum/icu_version_67_plus",
-  "rust_icu_ustring/icu_version_67_plus",
-]
 icu_version_in_env = [
   "rust_icu_common/icu_version_in_env",
   "rust_icu_sys/icu_version_in_env",
@@ -66,18 +54,6 @@ use-bindgen = [
   "rust_icu_uenum/use-bindgen",
   "rust_icu_ustring/use-bindgen",
 ]
-icu_version_68_plus = [
-  "rust_icu_common/icu_version_68_plus",
-  "rust_icu_sys/icu_version_68_plus",
-  "rust_icu_uenum/icu_version_68_plus",
-  "rust_icu_ustring/icu_version_68_plus",
-]
-icu_version_69_max = [
-  "rust_icu_common/icu_version_69_max",
-  "rust_icu_sys/icu_version_69_max",
-  "rust_icu_uenum/icu_version_69_max",
-  "rust_icu_ustring/icu_version_69_max",
-]
 
 [badges]
 is-it-maintained-issue-resolution = { repository = "google/rust_icu" }