Moving to Massachusetts as a master plumber: every state's rule

Massachusetts issues a statewide Master Plumber license through the Board of State Examiners of Plumbers and Gas Fitters. M.G.L. c. 142, § 3 requires a master plumber's license to engage in the business as a master plumber; the master license must be displayed in the place of business, and advertising must show the designation and license number. A licensed master plumber may carry on gas-fitting work throughout the commonwealth, subject to local permits and bonding. Under § 4 the examiners must examine each applicant for a master plumber's license; the statute has no reciprocity or exam-waiver provision.