67 Pa. Code § 63.131
A Pennsylvania apportioned registration plate shall be attached to a vehicle and the appropriate cab card carried in the vehicle no later than June 1 of a registration year.
The provisions of this § 63.131 adopted April 29, 1983, effective April 30, 1983, 13 Pa.B. 1440; corrected February 24, 1984, effective November 26, 1983, 14 Pa.B. 661; readopted May 6, 1988, effective immediately and applies retroactively to April 30, 1988, 18 Pa.B. 2130. Immediately preceding text appears at serial page (87697).