Each retirement system, shall on or before October 15 of each year, furnish the actuary with such information as is required to determine the amount to be paid for the pension fund thereof for the fiscal year commencing on the next July 1. The actuary shall on or before December 15, determine such amount and specify in a written notice to said board the amounts so required to be paid. For those systems who have not submitted the necessary information, the actuary shall determine appropriation amounts based on conservative actuarial assumptions.
840 CMR, § 5.04