新的 AWS 帳號將會自動啟用長版的 Resource ID：「New accounts default to long EC2 resource IDs on March 7」。
還是可以 opt-out 改回來，不過官方還是建議儘量用長的 ID 測試，因為今年年底將全面強迫使用：
We recommend testing longer IDs before transitioning; however, if you have not yet tested your systems for compatibility with the longer format, you still have the option to opt out and receive shorter IDs until early December 2016.