67 Pa. Code § 47.3 – Manner of attachment.

Every registration plate shall be securely fastened to the vehicle:

(1) So as to be clearly visible.
(2) In a horizontal position.
(3) At a height of not less than 12 inches from the ground, measuring from the bottom of the registration plate.
(4) So as to prevent the registration plate from swinging.

Source

The provisions of this § 47.3 adopted August 19, 1977, effective August 20, 1977, 7 Pa.B. 2361; readopted September 8, 1989, effective September 9, 1989, 19 Pa.B. 3828. Immediately preceding text appears at serial page (95332).