University police will begin an all-out campaign tonight to enforce the recently announced University rule prohibiting overnight student parking in the area.

Eight or ten men will be added to the night patrol force in an attempt to "hit the entire area every night," according to police officials. The "area" involved is bordered by the Charles River, Boylston St., Cambridge St., Trowbridge St., and Putnam St.

Police reported a "mild rush" on spaces in the Business School parking lot, with about 18 spaces rented yesterday. Fifty spaces in the lot are still available.

Although the new rule differs substantially from Cambridge parking ordinances, a local attorney said yesterday that it is legally sound. Many students had questioned the University's right to regulate private property in a case involving city streets. They felt that Cambridge traffic problems are beyond the jurisdiction of Harvard.

The attorney's opinion, however, was that "A student enters Harvard with the understanding that he will be subject to any regulations that the University may decide to pass, as long as they are reasonable."

Speaking as a Cambridge citizen, the attorney added that he felt the decision would help University relations with residents of the town, since it indicates that Harvard is making an attempt to alleviate the parking problem.

Dean Leighton called attention to a provision in the booklet, "Regulations for Students in Harvard College," which states, "offences against law and order . . . will be dealt with as the Faculty or the Administrative Board shall determine."