Mass. Gen. Laws ch. 41 § 108N 1/2
Notwithstanding any general or special law to the contrary, a city or town, acting through the appointing authority for the treasurer, assessor or collector in that city or town, may establish an employment contract to provide for the salary, fringe benefits and other conditions of employment including, but not limited to, severance pay, relocation expenses, reimbursement for expenses incurred in the performances of duties of the office, liability insurance and leave for an appointed treasurer, assessor or collector or a person performing the duties of an appointed treasurer, assessor or collector under a different title.
The contract shall be in accordance with and subject to the city or town charter and shall prevail over a conflicting local personnel by-law, ordinance, rule or regulation. In addition to the benefits provided to municipal employees under chapters 32 and 32B, the contract may provide for supplemental retirement and insurance benefits.
This section shall not affect the appointment or removal powers of an appointing authority over the treasurer, assessor or collector of the city or town or a person performing the duties of a treasurer, assessor or collector under a different title. This section shall not grant tenure to such an officer, affect section 67 of chapter 44 or apply to an elected treasurer, assessor or collector.
Mass. Gen. Laws ch. 41, § 108N 1/2