86.333. At the first valuation after the effective date ofthese amendments the actuary engaged by the board of trusteesshall compute the rate percent of the total earnable compensationof all members which is equivalent to four percent of the amountof the total unfunded benefit liability on account of all membersand beneficiaries which is not dischargeable by the aforesaidnormal contribution made on account of such members during theremainder of their active service. The rate percent originallyso determined shall be known as "the accrued liabilitycontribution rate".
(L. 1957 p. 256 ยง 44)