diff --git a/src/frostfs_testlib/resources/error_patterns.py b/src/frostfs_testlib/resources/error_patterns.py
index e2e4c48..e92b33d 100644
--- a/src/frostfs_testlib/resources/error_patterns.py
+++ b/src/frostfs_testlib/resources/error_patterns.py
@@ -23,6 +23,5 @@ INVALID_RANGE_OVERFLOW = "invalid '{range}' range: uint64 overflow"
 INVALID_OFFSET_SPECIFIER = "invalid '{range}' range offset specifier"
 INVALID_LENGTH_SPECIFIER = "invalid '{range}' range length specifier"
 
-S3_MALFORMED_XML_REQUEST = (
-    "The XML you provided was not well-formed or did not validate against our published schema."
-)
+S3_BUCKET_DOES_NOT_ALLOW_ACL = "The bucket does not allow ACLs"
+S3_MALFORMED_XML_REQUEST = "The XML you provided was not well-formed or did not validate against our published schema."
diff --git a/src/frostfs_testlib/resources/s3_acl_grants.py b/src/frostfs_testlib/resources/s3_acl_grants.py
new file mode 100644
index 0000000..37005e8
--- /dev/null
+++ b/src/frostfs_testlib/resources/s3_acl_grants.py
@@ -0,0 +1,9 @@
+ALL_USERS_GROUP_URI = "http://acs.amazonaws.com/groups/global/AllUsers"
+ALL_USERS_GROUP_WRITE_GRANT = {"Grantee": {"Type": "Group", "URI": ALL_USERS_GROUP_URI}, "Permission": "WRITE"}
+ALL_USERS_GROUP_READ_GRANT = {"Grantee": {"Type": "Group", "URI": ALL_USERS_GROUP_URI}, "Permission": "READ"}
+CANONICAL_USER_FULL_CONTROL_GRANT = {"Grantee": {"Type": "CanonicalUser"}, "Permission": "FULL_CONTROL"}
+
+# https://docs.aws.amazon.com/AmazonS3/latest/userguide/acl-overview.html#canned-acl
+PRIVATE_GRANTS = [CANONICAL_USER_FULL_CONTROL_GRANT]
+PUBLIC_READ_GRANTS = [CANONICAL_USER_FULL_CONTROL_GRANT, ALL_USERS_GROUP_READ_GRANT]
+PUBLIC_READ_WRITE_GRANTS = [CANONICAL_USER_FULL_CONTROL_GRANT, ALL_USERS_GROUP_WRITE_GRANT, ALL_USERS_GROUP_READ_GRANT]
diff --git a/src/frostfs_testlib/steps/s3/s3_helper.py b/src/frostfs_testlib/steps/s3/s3_helper.py
index baf362b..ab0cee3 100644
--- a/src/frostfs_testlib/steps/s3/s3_helper.py
+++ b/src/frostfs_testlib/steps/s3/s3_helper.py
@@ -120,32 +120,28 @@ def assert_object_lock_mode(
         ).days == retain_period, f"Expected retention period is {retain_period} days"
 
 
-def assert_s3_acl(acl_grants: list, permitted_users: str):
-    if permitted_users == "AllUsers":
-        grantees = {"AllUsers": 0, "CanonicalUser": 0}
-        for acl_grant in acl_grants:
-            if acl_grant.get("Grantee", {}).get("Type") == "Group":
-                uri = acl_grant.get("Grantee", {}).get("URI")
-                permission = acl_grant.get("Permission")
-                assert (uri, permission) == (
-                    "http://acs.amazonaws.com/groups/global/AllUsers",
-                    "FULL_CONTROL",
-                ), "All Groups should have FULL_CONTROL"
-                grantees["AllUsers"] += 1
-            if acl_grant.get("Grantee", {}).get("Type") == "CanonicalUser":
-                permission = acl_grant.get("Permission")
-                assert permission == "FULL_CONTROL", "Canonical User should have FULL_CONTROL"
-                grantees["CanonicalUser"] += 1
-        assert grantees["AllUsers"] >= 1, "All Users should have FULL_CONTROL"
-        assert grantees["CanonicalUser"] >= 1, "Canonical User should have FULL_CONTROL"
+def _format_grants_as_strings(grants: list[dict]) -> list:
+    grantee_format = "{g_type}::{uri}:{permission}"
+    return set(
+        [
+            grantee_format.format(
+                g_type=grant.get("Grantee", {}).get("Type", ""),
+                uri=grant.get("Grantee", {}).get("URI", ""),
+                permission=grant.get("Permission", ""),
+            )
+            for grant in grants
+        ]
+    )
 
-    if permitted_users == "CanonicalUser":
-        for acl_grant in acl_grants:
-            if acl_grant.get("Grantee", {}).get("Type") == "CanonicalUser":
-                permission = acl_grant.get("Permission")
-                assert permission == "FULL_CONTROL", "Only CanonicalUser should have FULL_CONTROL"
-            else:
-                logger.error("FULL_CONTROL is given to All Users")
+
+@reporter.step("Verify ACL permissions")
+def verify_acl_permissions(actual_acl_grants: list[dict], expected_acl_grants: list[dict], strict: bool = True):
+    actual_grants = _format_grants_as_strings(actual_acl_grants)
+    expected_grants = _format_grants_as_strings(expected_acl_grants)
+
+    assert expected_grants <= actual_grants, "Permissions mismatch"
+    if strict:
+        assert expected_grants == actual_grants, "Extra permissions found, must not be there"
 
 
 @reporter.step("Delete bucket with all objects")