219. For the purposes of computing the interest, the contributions of the employee within the meaning of section 50, except the amounts that the employee had paid into a pension plan from which the service was transferred to the plan established under this Act pursuant to sections 101, 109.2, 109.8 and 158, are deemed received at the mid-point of each year. The manner of computing the interest on any contribution of the employee within the meaning of section 50 is established by regulation.
1983, c. 24, s. 1; 1987, c. 107, s. 208; 2004, c. 39, s. 172.