G.L. c. 32, § 3(5) provides, in pertinent part:
[A]ny member of any system who rendered service in any governmental unit other than that by which he is presently employed, in a temporary, provisional, or substitute position and who was excluded from membership by the rules of any board, may, before the date any retirement allowance becomes effective for him, pay into the annuity savings fund of the system … an amount equal to that which would have been withheld as regular deductions from his regular compensation for such previous period … had such service been rendered in the governmental unit by which he is presently employed and in a position subject to the provisions of this chapter … Upon the completion of such payments such member shall receive the same credit for such period of his previous intrastate service … as would have been allowed if such service had been rendered by him in the governmental unit by which he is presently employed. Such member shall furnish the board with such information as it shall require to determine the amount to be paid and the credit to be allowed under this subdivision.
Work of a seasonal nature shall be credited as one year of service for at least seven calendar months of work.
ENROLLMENT Every employee who is eligible to become a member of the Winthrop Retirement System must complete the necessary enrollment and beneficiary forms, including a birth certificate and, if a veteran of the armed forces, a military service discharge or its equivalent.
Elected officials may enroll within 90 days after the date of assuming office. If they do not enroll during that period, they waive eligibility for membership in the system for that term of office.
All references to full-time employment or a full year or similar terms in these regulations shall be deemed to be governed by their definitions.
CREDIT FOR PART‑TIME SERVICE FOR WORK WHILE A MEMBER IN SERVICE: Full Year Credit: Part‑time work shall be credited as a full year of service for a full year of work, work of less than a full year shall be credited pro-rata.
CREDIT FOR PART‑TIME SERVICE PRIOR TO MEMBERSHIPWithin one year of becoming a member of the Winthrop Retirement System, each person shall file a statement detailing all service for which he claims credit towards retirement in this system.
1/2 credit shall be allowed for buy‑back of less than 24hours per week for a full year.
BENEFITS TO CHILDREN OF RETIREES Benefits will be paid in accordance with G.L. c. 32 secs. 7, 9, and 12 option d and 12B. Each year by September 1, proof of enrollment in an accredited educational institution must be presented for every child over age 18 in order to receive additional benefits as provided by law.
In all cases of correction of an underpayment or non-payment of a pension or benefit to a member or beneficiary of the Winchester Retirement System which results in a onetime retroactive payment of benefits, such payment shall include interest for such period of underpayment or non-payment at the rate annually determined for such period by the Public Employee Retirement Administration Commission pursuant to G.L. c. 32, § 22(6).
In all cases of a correction of an overpayment of a pension or benefit to a member or beneficiary of the Winchester Retirement System, the amount of overpayment shall be due from the member or beneficiary, along with interest for said period of overpayment at the rate annually determined by the Public Employee Retirement Administration Commission pursuant to G.L. c. 32, § 22(6).