79. Where an agreement for such purpose has been made with the authority administering a similar plan, the whole amount of an overpayment made by an employee as contributions under this Act, under the similar plan or under both at the same time, shall be refundable, either under this Act or under the similar plan.
Such an agreement shall contain provisions providing for the making of financial adjustments by reason of the payments made.
Failing such an agreement, the total amount of the overpayment made by an employee as contributions under this Act and under a similar plan shall be refundable under this Act, notwithstanding any other provision, only in that proportion which, for the year, the aggregate of the amounts deducted from his salary or wages as contributions under this Act is of the aggregate of the amounts deducted from his salary or wages as contributions under either this Act or a similar plan.
1965 (1st sess.), c. 24, s. 92; 1972, c. 53, s. 25; 2018, c. 22018, c. 2, s. 411.