The department has long prohibited the use of illegal drugs, but fire officials said that enforcement of the policy had been spotty.

Federal law has long prohibited dealers from selling such vans to primary and secondary schools, but some dealers make such sales anyway.

Section 609 has long prohibited the sale of small cans of ozone-depleting refrigerants to anyone other than a certified technician.

The Canadian Human Rights Act has long prohibited discrimination on the basis of gender, race, ethnicity, and certain other grounds.

Claiming there were no trees in SoHo during its industrial period, the commission has long prohibited the planting of street trees here.

Tennessee prisons have long prohibited obscene materials, along with exhortations to violence, instructions for manufacturing weapons and "plans to escape."

(State law has long prohibited electricity resale to residential tenants.)

This has not been an issue in the Senate, which has long prohibited its members from converting campaign money for personal use.

Air-conditioners, long prohibited, protrude from new windows.

The school system has long prohibited students from taking cellphones into schools.