§ 374.1 - Applicability. Subpart A [§ 374.101 - § 374.113] - Subpart A—Discrimination in Operations of Interstate Motor Carriers of Passengers Subpart B [§ 374.201 - § 374.201] - Subpart B—Limitation of Smoking on Interstate Passenger Carrier Vehicles Subpart C [§ 374.301 - § 374.319] - Subpart C—Adequacy of Intercity Motor Carrier Passenger Service Subpart D [§ 374.401 - § 374.405] - Subpart D—Notice of and Procedures for Baggage Excess Value Declaration Subpart E [§ 374.501 - § 374.505] - Subpart E—Incidental Charter Rights