Michigan Compiled Laws, Chapter 257. Motor Vehicles § 257.312i

Sec. 312i. (1) A person, before operating a pickup truck equipped with a fifth wheel assembly with an attached semitrailer designed for recreational living purposes and towing an additional trailer or semitrailer, shall procure an R vehicle indorsement on the operator's or chauffeur's license. An R vehicle indorsement shall not be issued to a person who is 17 years of age or less.

(2) Before a person is issued an original R vehicle indorsement on an operator's or chauffeur's license, the person shall pass a written examination which shall include subjects designed to cover knowledge needed to tow a double trailer combination. All examinations shall be administered as provided in this act.

(3) Every application for an R vehicle indorsement on an operator's or chauffeur's license for operation of a pickup truck as provided in this section shall be accompanied by a fee of $10.00 which shall be in addition to any other original or renewal operator or chauffeur license fee.

(4) A person who is licensed under this act to operate either a group A designated vehicle with a T vehicle indorsement or a group B designated vehicle with a T vehicle indorsement is exempt from the requirements of this section.