Haverhill Retirement System v. Contributory Retirement Appeal Board

This is an appeal arising from the erroneous enrollment of a municipal employee in the Haverhill Retirement System (HRS) rather than the Massachusetts Teachers’ Retirement System (MTRS). The issue before us is whether the HRS may be required to make a statutorily defined reimbursement to MTRS for the period of time it received mistaken contributions once the employee, and his creditable service, were transferred *130to MTRS. This question turns on an issue of statutory construction, namely whether service “pertains” to a municipal retirement system within the meaning of G. L. c. 32, § 3(8)(c), as…