Section 15. (a) Deferred payments or installments of claims shall be considered as fixed liabilities on the happening of the contingency upon which such payments or installments are thereafter to be paid. Such liability shall be the present value of such future payments or installments upon the rate of interest and mortality assumed by the society for establishing contributions and for valuation. A society shall at once, upon the filing of due proofs of the happening of the contingency, set apart a fund to meet such deferred payments, regardless of proposed future collections to meet any such payments, and hold such funds, with its interest accretions, in trust for the beneficiary entitled thereto.
(b) No society shall provide for such deferred payments or installments unless it possesses the full reserve specified in section 16, or if paying accident benefits only, has assets sufficient to pay all its liabilities.