An old custom prohibits the wearing of white after Labour Day.

Heiren custom had prohibited them from carrying communicators.

Military customs and procedures prohibited Fay from interviewing Sanchez because he was junior in rank.

Islamic law and custom prohibited the enslavement of free dhimmis within lands under Islamic rule.

That was when the mixing of races began, even though the social customs and laws of the dominant whites prohibited it.

It was odd, Kennon reflected bitterly, that humans could do with animals what their customs and codes prohibited them from doing to themselves.

He came; and he would have been delighted to shew his uniform there too, had not cruel custom prohibited its appearance except on duty.

The Armenian customs didn't tolerate this and strictly prohibited such behavior.

Xanth custom prohibited any reigning Queen, but did not specifically bar a female King.