不得取消和更改预订。

Non changes and cancellation allowed.

youdao

应当有一个制定的规程来规定输入和修改数据，以及个人密码的权限的授予、取消和更改。

There should be a defined procedure for the issue, cancellation, and alteration of authorisation to enter and amend data, including the changing of personal passwords.

youdao

最后，为了安全起见，请考虑一下将高速缓存超时，因为密码更改和标识会被取消。

Finally, for security's sake, think about timing out the cache because passwords change and IDs can be revoked.

youdao