Commissioner. The Commissioner of Insurance, appointed pursuant to M.G.L. c. 26, § 6.
Motorcycle. Any motor vehicle having a seat or saddle for the use of the rider and designed to travel on not more than three wheels in contact with the ground, including any bicycle with a motor or a driving wheel attached, except a tractor or a motor vehicle designed to carry golf clubs and not more than four persons, an industrial three-wheel truck or a motor vehicle on which the operators and passengers ride in an enclosed cab, or a motorized bicycle.
211 CMR, § 3.01