81. If the aggregate of the amounts paid as a pension to a public officer or employee and of the benefits paid after the death of such person to his widow or to a husband and to the children of such officer or employee who are dependents of the widow or of the husband, is less than the aggregate amount of the contributions paid by such officer or employee, the difference shall be paid without interest to his estate, in one single payment, as soon as the payments of such pension or of such benefits to the last person who was entitled thereto have ceased.
1969, c. 15, s. 29; 1974, c. 10, s. 19.