49 CFR § 387.27 - Applicability.
(b) Exception. The rules in this subpart do not apply to -
(1) A motor vehicle transporting only school children and teachers to or from school;
(3) A motor vehicle carrying less than 16 individuals in a single daily round trip to commute to and from work; and
(4) A motor vehicle operated by a motor carrier under contract providing transportation of preprimary, primary, and secondary students for extracurricular trips organized, sponsored, and paid by a school district.