Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 90, § 1E

A motorized scooter shall not be operated on any way by a person not possessing a valid driver's license or learner's permit, nor at a speed in excess of 20 miles per hour. A person operating a motorized scooter upon a way shall have the right to use all public ways in the commonwealth except limited access or express state highways where signs specifically prohibiting scooters or bicycles have been posted, and shall be subject to all traffic laws and regulations of the commonwealth and the regulations contained in this section, except that: (1) a scooter operator shall keep to the right side of the road at all times, including when passing a motor vehicle which is moving in the travel lane of the way; and (2) the scooter shall be equipped with operational stop and turn signals so that the operator can keep both hands on the handlebars at all times. No person shall operate a motor scooter upon any way at any time after sunset or before sunrise.

A person operating a motorized scooter shall wear protective headgear conforming with such minimum standards of construction and performance as the registrar may prescribe. No person operating a motorized scooter shall permit any other person to ride as a passenger on the scooter.

A person convicted of a violation of this section shall be punished by a fine of not more than $25 for the first violation, not less than $25 nor more than $50 for a second violation and not less than $50 nor more than $100 for a third or subsequent violation.