REGISTRATION YEAR
1912-38: 1/1 to 12/31
1939: 1/1 to 2/28/1940
1940: 3/1 to 2/28
1945-59: 4/1 to 3/31
1961-77: 5/1 to 4/30
Monthly Staggered Registration began 1977 for new registrations
only, expire "SEP 77". Renewals not staggered, expire "MAR 78".
New registrations since assigned previous month of next year.
