Mass. Gen. Laws ch. 48, § 57I: Officers of professional organization; leave without loss of pay or benefits

Section 57I. In any city, town or district which accepts the provisions of this section, elected officers of the Professional Firefighters of Massachusetts, AFL–CIO–CLC, shall be granted leave, without loss of pay or benefits and without being required to make up lost time, if on duty, by the municipal employer for regularly scheduled work hours spent in the performance of their elected responsibilities in such organization.