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# Amazon SQS 自定义策略的限制
<a name="sqs-limitations-of-custom-policies"></a>

## 跨账户访问
<a name="sqs-cross-account-access"></a>

跨账户权限不能应用于以下操作：
+ `[AddPermission](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_AddPermission.html)`
+ `[CancelMessageMoveTask](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_CancelMessageMoveTask.html)`
+ `[CreateQueue](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_CreateQueue.html)`
+ `[DeleteQueue](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_DeleteQueue.html)`
+ `[ListMessageMoveTask](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_ListMessageMoveTasks.html)`
+ `[ListQueues](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_ListQueues.html)`
+ `[ListQueueTags](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_ListQueueTags.html)`
+ `[RemovePermission](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_RemovePermission.html)`
+ `[SetQueueAttributes](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_SetQueueAttributes.html)`
+ `[StartMessageMoveTask](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_StartMessageMoveTask.html)`
+ `[TagQueue](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_TagQueue.html)`
+ `[UntagQueue](https://docs.amazonaws.cn/AWSSimpleQueueService/latest/APIReference/API_UntagQueue.html)`

## 条件键
<a name="sqs-condition-keys"></a>

Amazon SQS 目前只支持 [IAM 中可用条件键](https://docs.amazonaws.cn/IAM/latest/UserGuide/reference_policies_elements.html#AvailableKeys)的有限子集。有关更多信息，请参阅 [Amazon SQS API 权限：操作和资源参考](sqs-api-permissions-reference.md)。