The preceding section shall not impair any right or authority derived from, or exercised under, any law of the United States, or any right, license or privilege lawfully granted by any department thereof.
Mass. Gen. Laws ch. 91, § 51
Impairment of right or authority derived from federal government
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.