; and (C) with respect to which any change from the actuarial assumptions and methods used in the previous plan year shall be certified by the plan actuary and the actuarial rationale for such change provided in the annual report required by section 103. (2) Fair market value of assets The value of the plan’s assets shall be taken into account on the basis of their fair market value. (3) Determination of normal cost and plan liabilities A plan’s normal cost and liabilities shall be based on the most recent actuarial valuation required under section 801(a)(5)(A) and the unit credit funding method. (4) Time when certain contributions deemed made Any contributions for a plan year made by an employer after the last day of such plan year, but not later than two and one-half months after such day, shall be deemed to have been made on such last day. For purposes of this paragraph, such two and one-half month period may be extended for not more than six months under regulations prescribed by the Secretary of the Treasury. (5) Additional actuarial assumptions Except where otherwise provided in this part, the provisions of section 305(b)(3)(B) shall apply to any determination or projection under this part. 803. Realignment program (a) Realignment program (1) Adoption In any case in which the plan actuary certifies under section 802(a) that the plan’s projected funded ratio is below 120 percent for the plan year, the plan sponsor shall adopt a realignment program under paragraph (2) not later than 210 days after the due date of the certification required under such section 802(a). The plan sponsor shall adopt an updated realignment program for each succeeding plan year for which a certification described in the preceding sentence is made. (2) Content of realignment program (A) In general A realignment program adopted under this paragraph is a written program which consists of all reasonable measures, including options or a range of options to be undertaken by the plan sponsor or proposed to the bargaining parties,