if valid := globalTierConfigMgr.IsTierValid(rule.Transition.StorageClass); !valid {
				return errInvalidStorageClass
			}
		}
		if rule.NoncurrentVersionTransition.StorageClass != "" {
			if valid := globalTierConfigMgr.IsTierValid(rule.NoncurrentVersionTransition.StorageClass); !valid {
				return errInvalidStorageClass
			}
		}
	}
	return nil
}