actuarial cost method
(31)The term “advance funding actuarial cost method” or “actuarial cost method” means a recognized actuarial technique utilized for establishing the amount and incidence of the annual actuarial cost of pension plan benefits and expenses. Acceptable actuarial cost methods shall include the accrued benefit cost method (unit credit method), the entry age normal cost method, the individual level premium cost method, the aggregate cost method, the attained age normal cost method, and the frozen initial liability cost method. The terminal funding cost method and the current funding (pay-as-you-go) cost method are not acceptable actuarial cost methods. The Secretary of the Treasury shall issue regulations to further define acceptable actuarial cost methods.