NEW YORK (AP) – A judge has sided with New York City in its fight to regulate adult bookstores and video stores accused of veiling their X-rated focus to skirt zoning rules.

The Manhattan judge’s ruling Monday lets the city enforce 2001 rules. City officials say an unknown number of businesses could be forced to change their emphasis or move.

A lawyer for adult businesses that sued over the rules didn’t immediately return a telephone call Tuesday evening.

City zoning regulations limit where many sex-oriented businesses can operate. The rules don’t apply if at least 60 percent of the business is devoted to non-adult items.

The city says some X-rated enterprises made only sham efforts to comply with the 60-percent rule so they could avoid the zoning rules.