In compliance with the new city ordinance which has revised and restricted parking rules in the vicinity of Harvard Square, the Cambridge Police will start changing signs next Monday, with distribution of tags to violators following soon after, Captain John J. Canney, in charge of traffic regulation, announced yesterday.

One Hour Limit

By the new ordinance parking near the center of the Square will be limited to one hour from 7 o'clock in the morning to 7 o'clock at night. Double and over-night parking will also be checked by the new drive. For a second violation of the regulation there will be a slight fine, while third offense will require appearance in court.

Following a meeting of Cambridge business men Monday, where local merchants voiced discontent at constant traffic congestion in the Square, Captain Canney and his chief, Timothy F. Leahy, released their intended plan of action and said signs will be changed "by sometime next month".

"Students Law-abiding"

A similar drive against over-time parking was carried out over a year ago when some 750 students were victims of police vigilance. As at that time, Police vehemently deny that the action is directed at undergraduates. Said Captain Canney yesterday: "We have no trouble with Harvard men . . . they're law-abiding, on the whole."

Last October, a system of rotary traffic was attempted in the Square and subsequently discarded. The second move by the police in the course of a single college year came as a complete surprize yesterday.