67 Pa. Code § 63.113
The fee for the proportional registration of trailers, semi-trailers and auxiliary axles shall be computed for those jurisdictions which require it by using the same factor determined by in-jurisdiction and total miles in § 63.111 (relating to general rule). Since the Commonwealth does not apportion these vehicles, the regular Commonwealth registration fee for trailers will be added to the apportioned fees.
The provisions of this § 63.113 adopted April 29, 1983, effective April 30, 1983, 13 Pa.B. 1440; readopted May 6, 1988, effective immediately and applies retroactively to April 30, 1988, 18 Pa.B. 2130. Immediately preceding text apepars at serial page (87693).