October 5, 1960. Voter registration --held in Cambridge at the police station on Green St. --closes this Friday throughout Massachusetts. College students over 21 who have lived in the state for a year and in the city for six months, are not supported by out-of-state parents, and register for a car in Massachusetts, may be eligible to vote here. All non-permanent residents must present their cases to the election commissioner for a decision. About 20 states permit registration by mail, and half of them have not passed their deadlines for registering. At least one club, the Students for Nixon, provides information on deadlines and procedure at its offices at 52 Dunster St., weekdays from 2 to 4 p.m.