diff --git a/placement/policies/aggregate.py b/placement/policies/aggregate.py
index 4fbd86a20..65459d823 100644
--- a/placement/policies/aggregate.py
+++ b/placement/policies/aggregate.py
@@ -11,6 +11,7 @@
 #    under the License.
 
 
+from oslo_log import versionutils
 from oslo_policy import policy
 
 from placement.policies import base
@@ -21,10 +22,23 @@ LIST = PREFIX % 'list'
 UPDATE = PREFIX % 'update'
 BASE_PATH = '/resource_providers/{uuid}/aggregates'
 
+DEPRECATED_REASON = """
+The aggregates API now supports a read-only role by default.
+"""
+
+deprecated_list_aggregates = policy.DeprecatedRule(
+    name=LIST,
+    check_str=base.RULE_ADMIN_API
+)
+deprecated_update_aggregates = policy.DeprecatedRule(
+    name=UPDATE,
+    check_str=base.RULE_ADMIN_API
+)
+
 rules = [
     policy.DocumentedRuleDefault(
         LIST,
-        base.RULE_ADMIN_API,
+        base.SYSTEM_READER,
         "List resource provider aggregates.",
         [
             {
@@ -32,11 +46,14 @@ rules = [
                 'path': BASE_PATH
             }
         ],
-        scope_types=['system']
+        scope_types=['system'],
+        deprecated_rule=deprecated_list_aggregates,
+        deprecated_reason=DEPRECATED_REASON,
+        deprecated_since=versionutils.deprecated.WALLABY
     ),
     policy.DocumentedRuleDefault(
         UPDATE,
-        base.RULE_ADMIN_API,
+        base.SYSTEM_ADMIN,
         "Update resource provider aggregates.",
         [
             {
@@ -44,7 +61,10 @@ rules = [
                 'path': BASE_PATH
             }
         ],
-        scope_types=['system']
+        scope_types=['system'],
+        deprecated_rule=deprecated_update_aggregates,
+        deprecated_reason=DEPRECATED_REASON,
+        deprecated_since=versionutils.deprecated.WALLABY
     ),
 ]
 
diff --git a/placement/tests/functional/gabbits/aggregate-legacy-rbac.yaml b/placement/tests/functional/gabbits/aggregate-legacy-rbac.yaml
new file mode 100644
index 000000000..c65f1dbcd
--- /dev/null
+++ b/placement/tests/functional/gabbits/aggregate-legacy-rbac.yaml
@@ -0,0 +1,134 @@
+---
+# Test the CRUD operations on /resource_providers/{uuid}/aggregates* using a
+# system administrator context.
+fixtures:
+  - LegacyRBACPolicyFixture
+
+vars:
+  - &project_id $ENVIRON['PROJECT_ID']
+  - &system_admin_headers
+    x-auth-token: user
+    x-roles: admin,member,reader
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+    openstack-system-scope: all
+  - &system_reader_headers
+    x-auth-token: user
+    x-roles: reader
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+    openstack-system-scope: all
+  - &project_admin_headers
+    x-auth-token: user
+    x-roles: admin,member,reader
+    x-project-id: *project_id
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+  - &project_member_headers
+    x-auth-token: user
+    x-roles: member,reader
+    x-project-id: *project_id
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+  - &project_reader_headers
+    x-auth-token: user
+    x-roles: reader
+    x-project-id: *project_id
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+  - &agg_1 f918801a-5e54-4bee-9095-09a9d0c786b8
+  - &agg_2 a893eb5c-e2a0-4251-ab26-f71d3b0cfc0b
+
+tests:
+
+- name: system admin can create new resource provider
+  POST: /resource_providers
+  request_headers: *system_admin_headers
+  verbose: True
+  data:
+    name: $ENVIRON['RP_NAME']
+    uuid: $ENVIRON['RP_UUID']
+  status: 200
+
+- name: system reader cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_reader_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: project member cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_member_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: project reader cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_reader_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: project admin can update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_admin_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 200
+
+- name: system admin can update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_admin_headers
+  data:
+    resource_provider_generation: 1
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 200
+
+- name: system admin can list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_admin_headers
+  response_json_paths:
+    $.aggregates.`len`: 2
+
+- name: system reader can list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_reader_headers
+  response_json_paths:
+    $.aggregates.`len`: 2
+
+- name: project admin can list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_admin_headers
+  response_json_paths:
+    $.aggregates.`len`: 2
+
+- name: project member cannot list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_member_headers
+  status: 403
+
+- name: project reader cannot list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_reader_headers
+  status: 403
diff --git a/placement/tests/functional/gabbits/aggregate-secure-rbac.yaml b/placement/tests/functional/gabbits/aggregate-secure-rbac.yaml
new file mode 100644
index 000000000..298e603ab
--- /dev/null
+++ b/placement/tests/functional/gabbits/aggregate-secure-rbac.yaml
@@ -0,0 +1,133 @@
+---
+# Test the CRUD operations on /resource_providers/{uuid}/aggregates* using a
+# system administrator context.
+fixtures:
+  - SecureRBACPolicyFixture
+
+vars:
+  - &project_id $ENVIRON['PROJECT_ID']
+  - &system_admin_headers
+    x-auth-token: user
+    x-roles: admin,member,reader
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+    openstack-system-scope: all
+  - &system_reader_headers
+    x-auth-token: user
+    x-roles: reader
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+    openstack-system-scope: all
+  - &project_admin_headers
+    x-auth-token: user
+    x-roles: admin,member,reader
+    x-project-id: *project_id
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+  - &project_member_headers
+    x-auth-token: user
+    x-roles: member,reader
+    x-project-id: *project_id
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+  - &project_reader_headers
+    x-auth-token: user
+    x-roles: reader
+    x-project-id: *project_id
+    accept: application/json
+    content-type: application/json
+    openstack-api-version: placement latest
+  - &agg_1 f918801a-5e54-4bee-9095-09a9d0c786b8
+  - &agg_2 a893eb5c-e2a0-4251-ab26-f71d3b0cfc0b
+
+tests:
+
+- name: system admin can create new resource provider
+  POST: /resource_providers
+  request_headers: *system_admin_headers
+  verbose: true
+  data:
+    name: $ENVIRON['RP_NAME']
+    uuid: $ENVIRON['RP_UUID']
+  status: 200
+
+- name: system reader cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_reader_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: project admin cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_admin_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: project member cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_member_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: project reader cannot update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_reader_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 403
+
+- name: system admin can update aggregates
+  PUT: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_admin_headers
+  data:
+    resource_provider_generation: 0
+    aggregates:
+      - *agg_1
+      - *agg_2
+  status: 200
+
+- name: system admin can list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_admin_headers
+  response_json_paths:
+    $.aggregates.`len`: 2
+
+- name: system reader can list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *system_reader_headers
+  response_json_paths:
+    $.aggregates.`len`: 2
+
+- name: project admin cannot list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_admin_headers
+  status: 403
+
+- name: project member cannot list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_member_headers
+  status: 403
+
+- name: project reader cannot list aggregates
+  GET: /resource_providers/$ENVIRON['RP_UUID']/aggregates
+  request_headers: *project_reader_headers
+  status: 403