diff --git a/bazel/src/main/java/com/google/api/codegen/bazel/ApiDir.java b/bazel/src/main/java/com/google/api/codegen/bazel/ApiDir.java
index 2951d9d..fd2a37c 100644
--- a/bazel/src/main/java/com/google/api/codegen/bazel/ApiDir.java
+++ b/bazel/src/main/java/com/google/api/codegen/bazel/ApiDir.java
@@ -26,10 +26,12 @@ class ApiDir {
       Pattern.compile("_(?<version>[a-zA-Z]+\\d+[\\w]*)\\.yaml");
   private static String CLOUD_AUTH_SCOPE = "https://www.googleapis.com/auth/cloud-platform";
   private static String LOCATIONS_MIXIN = "name: google.cloud.location.Locations";
+  private static String IAM_POLICY_MIXIN = "name: google.iam.v1.IAMPolicy";
 
   private final Map<String, String> serviceYamlPaths = new TreeMap<>();
   private final Map<String, Boolean> cloudScopes = new TreeMap<>();
   private final Map<String, Boolean> containLocations = new TreeMap<>();
+  private final Map<String, Boolean> containIAMPolicy = new TreeMap<>();
 
   Map<String, String> getServiceYamlPaths() {
     return serviceYamlPaths;
@@ -43,6 +45,10 @@ Map<String, Boolean> getContainsLocations() {
     return containLocations;
   }
 
+  Map<String, Boolean> getContainsIAMPolicy() {
+    return containIAMPolicy;
+  }
+
   void parseYamlFile(String fileName, String fileBody) {
     // It is a service yaml
     Matcher m = SERVICE_YAML_TYPE.matcher(fileBody);
@@ -57,6 +63,9 @@ void parseYamlFile(String fileName, String fileBody) {
       if (fileBody.contains(LOCATIONS_MIXIN)) {
         containLocations.put(verKey, true);
       }
+      if (fileBody.contains(IAM_POLICY_MIXIN)) {
+        containIAMPolicy.put(verKey, true);
+      }
     }
   }
 }
diff --git a/bazel/src/main/java/com/google/api/codegen/bazel/ApiVersionedDir.java b/bazel/src/main/java/com/google/api/codegen/bazel/ApiVersionedDir.java
index f1e50d8..0d54fda 100644
--- a/bazel/src/main/java/com/google/api/codegen/bazel/ApiVersionedDir.java
+++ b/bazel/src/main/java/com/google/api/codegen/bazel/ApiVersionedDir.java
@@ -61,6 +61,8 @@ class ApiVersionedDir {
 
   private static String LOCATIONS_MIXIN = "name: google.cloud.location.Locations";
 
+  private static String IAM_POLICY_MIXIN = "name: google.iam.v1.IAMPolicy";
+
   private static final String[] PRESERVED_PROTO_LIBRARY_STRING_ATTRIBUTES = {
     // TypeScript:
     "package_name",
@@ -167,6 +169,8 @@ class ApiVersionedDir {
 
   private boolean containsLocations;
 
+  private boolean containsIAMPolicy;
+
   // Names of *_gapic_assembly_* rules (since they may be overridden by the user)
   private final Map<String, String> assemblyPkgRulesNames = new HashMap<>();
 
@@ -250,6 +254,10 @@ boolean hasLocations() {
     return this.containsLocations;
   }
 
+  boolean hasIAMPolicy() {
+    return this.containsIAMPolicy;
+  }
+
   void parseYamlFile(String fileName, String fileBody) {
     // It is a gapic yaml
     Matcher m = GAPIC_YAML_TYPE.matcher(fileBody);
@@ -286,6 +294,11 @@ void parseYamlFile(String fileName, String fileBody) {
       if (fileBody.contains(LOCATIONS_MIXIN)) {
         this.containsLocations = true;
       }
+
+      // API Serivce config has IAMPolicy API.
+      if (fileBody.contains(IAM_POLICY_MIXIN)) {
+        this.containsIAMPolicy = true;
+      }
     }
   }
 
@@ -428,5 +441,8 @@ void injectFieldsFromTopLevel() {
     
     boolean topLevelContainsLocations = parent.getContainsLocations().getOrDefault(version, false);
     containsLocations = topLevelContainsLocations ? topLevelContainsLocations : containsLocations;
+
+    boolean topLevelContainsIAMPolicy = parent.getContainsIAMPolicy().getOrDefault(version, false);
+    containsIAMPolicy = topLevelContainsIAMPolicy ? topLevelContainsIAMPolicy : containsIAMPolicy;
   }
 }
diff --git a/bazel/src/main/java/com/google/api/codegen/bazel/BazelBuildFileView.java b/bazel/src/main/java/com/google/api/codegen/bazel/BazelBuildFileView.java
index e4d371b..afe5bd9 100644
--- a/bazel/src/main/java/com/google/api/codegen/bazel/BazelBuildFileView.java
+++ b/bazel/src/main/java/com/google/api/codegen/bazel/BazelBuildFileView.java
@@ -136,6 +136,14 @@ class BazelBuildFileView {
         "java_gapic_test_deps", joinSetWithIndentationNl(mapJavaGapicTestDeps(actualImports)));
     tokens.put("extra_imports_java", joinSetWithIndentationNl(mapJavaGapicAssemblyPkgDeps(extraImports)));
 
+    // Add iam_policy_proto dependency for mix-in if individual language rules need it.
+    // Java does not seem to need it for mix-in purposes, so this is added after Java deps
+    // are worked out.
+    if (bp.hasIAMPolicy() && !bp.getProtoPackage().equals("google.iam.v1")) {
+      extraImports.add("//google/iam/v1:iam_policy_proto");
+    }
+    actualImports.addAll(extraImports);
+
     // Construct GAPIC import path & package name based on go_package proto option
     String protoPkg = bp.getProtoPackage();
     boolean isCloud = bp.getCloudScope() || protoPkg.contains("cloud");
diff --git a/bazel/src/test/data/googleapis/google/example/library/library_example_v1.yaml b/bazel/src/test/data/googleapis/google/example/library/library_example_v1.yaml
index 7483aaa..6ee74cf 100644
--- a/bazel/src/test/data/googleapis/google/example/library/library_example_v1.yaml
+++ b/bazel/src/test/data/googleapis/google/example/library/library_example_v1.yaml
@@ -20,6 +20,7 @@ title: Example Library API
 apis:
 - name: google.example.library.v1.LibraryService
 - name: google.cloud.location.Locations
+- name: google.iam.v1.IAMPolicy
 
 documentation:
   summary: A simple Google Example Library API.
diff --git a/bazel/src/test/data/googleapis/google/example/library/v1/BUILD.bazel.baseline b/bazel/src/test/data/googleapis/google/example/library/v1/BUILD.bazel.baseline
index 089b38a..50c1685 100644
--- a/bazel/src/test/data/googleapis/google/example/library/v1/BUILD.bazel.baseline
+++ b/bazel/src/test/data/googleapis/google/example/library/v1/BUILD.bazel.baseline
@@ -137,6 +137,7 @@ go_gapic_library(
         ":library_go_proto",
         "//google/api:httpbody_go_proto",
         "//google/cloud/location:location_go_proto",
+        "//google/iam/v1:iam_go_proto",
     ],
 )
 
diff --git a/bazel/src/test/data/googleapis/google/example/library/v1/library_example_v1.yaml b/bazel/src/test/data/googleapis/google/example/library/v1/library_example_v1.yaml
index 7483aaa..6ee74cf 100644
--- a/bazel/src/test/data/googleapis/google/example/library/v1/library_example_v1.yaml
+++ b/bazel/src/test/data/googleapis/google/example/library/v1/library_example_v1.yaml
@@ -20,6 +20,7 @@ title: Example Library API
 apis:
 - name: google.example.library.v1.LibraryService
 - name: google.cloud.location.Locations
+- name: google.iam.v1.IAMPolicy
 
 documentation:
   summary: A simple Google Example Library API.
diff --git a/bazel/src/test/data/googleapis/google/example/library/v1legacy/BUILD.bazel.baseline b/bazel/src/test/data/googleapis/google/example/library/v1legacy/BUILD.bazel.baseline
index cae434b..486409d 100644
--- a/bazel/src/test/data/googleapis/google/example/library/v1legacy/BUILD.bazel.baseline
+++ b/bazel/src/test/data/googleapis/google/example/library/v1legacy/BUILD.bazel.baseline
@@ -137,6 +137,7 @@ go_gapic_library(
         ":library_go_proto",
         "//google/api:httpbody_go_proto",
         "//google/cloud/location:location_go_proto",
+        "//google/iam/v1:iam_go_proto",
     ],
 )