VIRGINIA P = Truck
P/Y = Tractor
"APPORTIONMENT" BUS PLATES

According to undated Virginia state literature, these are issued to:
"Bus-Interstate Carrier choosing to apportion vehicles"
and according to a 1981 brochure, "APPORTIONMENT BUS non-IRP"

Even though I'm not sure if these are true "Apportioned" plates, I thought they deserved mention here.
1972
1975
1979

1976
1977
1978
1979
1980
1980
1981
1982
1982
1983
1983
1984
1984
1985
1987
1992
1994
1995
1997
1998
1998
1999
2000 BASE
2000 BASE
2000 BASE
2001