A valid Construction Noise permit issued by the Environmental Protection Department is required for the carrying out of percussive piling during the permitted hours.

如须于核准时间内进行撞击式打桩工程，必须事先取得由环保署签发的建筑噪音许可证。

youdao

Would you wish to be flown by a pilot who has already clocked up his permitted hours for the week - I suspect not.

BBC: NHS: Should government targets be scrapped?

The directive limits the number of hours they can operate before shutting down, and many coal plants are choosing to burn through their remaining permitted hours by April when the UK government introduces a carbon floor price.

CNN: Shale gas boom sparks EU coal revival

Choudhury, who publishes the independent newspaper The Weekly Blitz, was summoned to court on May 25 and made to stand on a dais in a room without air conditioning for several hours, and not permitted to sit.

CENTERFORSECURITYPOLICY: Center For Security Policy