REGISTRATION YEAR
1911-45: 1/1 to 12/31 (Grace period to 1/31 1934-39, 3/31 1940-45)
Monthly Staggered Registration began 1/1/1946, expire "6 46" to
"5 47", the first such system in the U.S. New registrations since
assigned previous month of next year, or same month of next year
if registered after the 15th of month.
