49 CFR § 391.67 - Farm vehicle drivers of articulated commercial motor vehicles.
The following rules in this part do not apply to a farm vehicle driver (as defined in § 390.5 of this subchapter) who is 18 years of age or older and who drives an articulated commercial motor vehicle:
(a) Section 391.11(b)(1), (b)(6) and (b)(8) (relating to general qualifications of drivers);
(b) Subpart C (relating to disclosure of, investigation into, and inquiries about the background, character, and driving record of drivers);
(c) Subpart D (relating to road tests); and
(d) Subpart F (relating to maintenance of files and records).