67 Pa. Code § 171.146
Doors shall be closed securely while the vehicle is in motion. Security lock systems on vehicle doors shall be kept open whenever the vehicle is in motion.
The provisions of this § 171.146 issued under the Vehicle Code, 75 Pa.C.S. § § 4103, 4551—4553 and 6103.
The provisions of this § 171.146 adopted September 13, 1996, effective September 14, 1996, 26 Pa.B. 4411.