A license or temporary permit to operate hoisting machinery shall be carried on the person of the operator or apprentice operator while operating such hoisting machinery. In the case of a temporary permit to operate compact hoisting equipment the operator must also carry a valid driver's license.
Mass. Gen. Laws ch. 146, § 54
Carrying of license or temporary permit
Official source: Massachusetts Legislature. Reproduced from public-domain Massachusetts statutes; confirm against the official source for the current text. Not legal advice.