Me. Rev. Stat. tit. 12, § 13112

Notwithstanding section 10650 and section 13106‑A, subsections 14‑A, 15 and 16, snowmobiles operated at a prearranged racing meet whose sponsor has obtained a permit to hold such a meet from the commissioner are exempt from the provisions of this chapter concerning registration, noise, horsepower and lights during the time of operation at such meets and at all prerace practices at the location of the meet.