52 Pa. Code § 37.271 – Application.

(a) This subchapter applies to lightweight vehicles as defined in § 37.202 (relating to definitions). Drivers, employes, officers, agents and representatives of motor carriers operating lightweight motor vehicles, shall be knowledgeable of and comply with this subchapter.
(b) Subchapters A and E (relating to general provisions; and penalties) apply to motor carriers operating lightweight vehicles, except for the following:
1. (1) 49 CFR Part 382 (relating to controlled substances and alcohol use and testing).
2. (2) 49 CFR Part 391 Subpart H (relating to controlled substances testing).
3. (3) 49 CFR Part 393 (relating to parts and accessories necessary for safe operation).
4. (4) 49 CFR 395.8 (relating to driver’s record of duty status).