A driver may not use a controlled substance, be under the influence of a controlled substance, or have any measured concentration or detected presence of a controlled substance, while operating a vehicle in passenger service.
52 Pa. Code § 29.507
A driver may not use a controlled substance, be under the influence of a controlled substance, or have any measured concentration or detected presence of a controlled substance, while operating a vehicle in passenger service.
52 Pa. Code § 29.507