No person employed for compensation shall be under any obligation to contribute to any candidate or political committee, or to render any political service on account of, or as a consequence of, his employment, and such person shall not be removed or otherwise prejudiced for refusing to do so. This section shall not apply to a person employed by a candidate or political committee or other organization organized for the purpose of rendering political service. A violation of this section shall be punished by a fine of not more than one thousand dollars or by imprisonment for not more than six months or both such fine and imprisonment. Each such violation shall constitute a separate offense.
Mass. Gen. Laws ch. 55, § 16B