diff --git a/.github/workflows/adr29-admission.yml b/.github/workflows/adr29-admission.yml
index eedecea..518ed40 100644
--- a/.github/workflows/adr29-admission.yml
+++ b/.github/workflows/adr29-admission.yml
@@ -42,11 +42,6 @@ on:
         type: string
         required: false
         default: adr29-admission-manifest.json
-      runs-on:
-        description: Approved Sylphx runner profile for the admission job.
-        type: string
-        required: false
-        default: sylphx-linux-standard
       base-ref:
         description: Base ref for diff calculation.
         type: string
@@ -76,7 +71,7 @@ permissions:
 jobs:
   admission:
     name: ${{ inputs.check-name }}
-    runs-on: [self-hosted, "${{ inputs.runs-on }}"]
+    runs-on: sylphx-linux-standard
     steps:
       - name: Checkout caller repository
         uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
diff --git a/.github/workflows/project-control.yml b/.github/workflows/project-control.yml
index b026db4..f05739f 100644
--- a/.github/workflows/project-control.yml
+++ b/.github/workflows/project-control.yml
@@ -31,13 +31,14 @@ jobs:
           reusable=.github/workflows/adr29-admission.yml
           template=templates/workflows/adr29-admission.yml
           project_control=.github/workflows/project-control.yml
-          test "$(grep -Ec '^[[:space:]]*default:[[:space:]]*sylphx-linux-standard$' "$reusable")" -eq 1
-          grep -Eq '^[[:space:]]*runs-on:[[:space:]]*\[self-hosted,[[:space:]]*"[$][{][{][[:space:]]*inputs\.runs-on[[:space:]]*[}][}]"[[:space:]]*\]$' "$reusable"
+          test "$(grep -Ec '^[[:space:]]*runs-on:' "$reusable")" -eq 1
+          test "$(grep -Ec '^[[:space:]]*runs-on:[[:space:]]*sylphx-linux-standard$' "$reusable")" -eq 1
           test "$(grep -Ec '^[[:space:]]*runs-on:' "$template")" -eq 4
           test "$(grep -Ec '^[[:space:]]*runs-on:[[:space:]]*sylphx-linux-standard$' "$template")" -eq 4
-          grep -Eq '^[[:space:]]*runs-on:[[:space:]]*sylphx-linux-standard$' "$project_control"
-          if grep -REn '^[[:space:]]*runs-on:[[:space:]]*(ubuntu|macos|windows)-' "$reusable" "$template" "$project_control"; then
-            echo '::error::GitHub-hosted runner declarations are not allowed in ADR-29 policy surfaces'
+          test "$(grep -Ec '^[[:space:]]*runs-on:' "$project_control")" -eq 1
+          test "$(grep -Ec '^[[:space:]]*runs-on:[[:space:]]*sylphx-linux-standard$' "$project_control")" -eq 1
+          if grep -REn '^[[:space:]]*runs-on:[[:space:]]*.*[$][{][{]' "$reusable" "$template" "$project_control"; then
+            echo '::error::dynamic runner declarations are not allowed in ADR-29 policy surfaces'
             exit 1
           fi
       - name: Check Changesets publisher syntax