diff --git a/google/cloud/billing/v1/BUILD.bazel b/google/cloud/billing/v1/BUILD.bazel
index c53cf5b4..f5c10bfd 100644
--- a/google/cloud/billing/v1/BUILD.bazel
+++ b/google/cloud/billing/v1/BUILD.bazel
@@ -151,54 +151,18 @@ go_gapic_assembly_pkg(
 ##############################################################################
 # Python
 ##############################################################################
+# This library is using Python microgenerator.
+# DO NOT OVERRIDE this Python section with autogenerated rules.
 load(
     "@com_google_googleapis_imports//:imports.bzl",
-    "moved_proto_library",
-    "py_gapic_assembly_pkg",
-    "py_gapic_library",
-    "py_grpc_library",
-    "py_proto_library",
-)
-
-moved_proto_library(
-    name = "billing_moved_proto",
-    srcs = [":billing_proto"],
-    deps = [
-        "//google/api:annotations_proto",
-        "//google/api:client_proto",
-        "//google/api:field_behavior_proto",
-        "//google/api:resource_proto",
-        "//google/iam/v1:iam_policy_proto",
-        "//google/iam/v1:policy_proto",
-        "//google/type:money_proto",
-        "@com_google_protobuf//:field_mask_proto",
-        "@com_google_protobuf//:timestamp_proto",
-    ],
-)
-
-py_proto_library(
-    name = "billing_py_proto",
-    plugin = "@protoc_docs_plugin//:docs_plugin",
-    deps = [":billing_moved_proto"],
-)
-
-py_grpc_library(
-    name = "billing_py_grpc",
-    srcs = [":billing_moved_proto"],
-    deps = [":billing_py_proto"],
+     py_gapic_assembly_pkg = "py_gapic_assembly_pkg2",
+     py_gapic_library = "py_gapic_library2",
 )
 
 py_gapic_library(
     name = "billing_py_gapic",
-    src = ":billing_proto_with_info",
-    gapic_yaml = "cloud_billing_gapic.yaml",
+    srcs = [":billing_proto"],
     grpc_service_config = "cloud_billing_grpc_service_config.json",
-    package = "google.cloud.billing.v1",
-    service_yaml = "cloudbilling.yaml",
-    deps = [
-        ":billing_py_grpc",
-        ":billing_py_proto",
-    ],
 )
 
 # Open Source Packages
@@ -206,8 +170,6 @@ py_gapic_assembly_pkg(
     name = "billing-v1-py",
     deps = [
         ":billing_py_gapic",
-        ":billing_py_grpc",
-        ":billing_py_proto",
     ],
 )