(a) Value of claim. The plan sponsor shall value an outstanding claim for withdrawal liability owed by an employer described in paragraph (b) of this section in accordance with paragraphs (a)(1) and (a)(2) of this section:

(1) If the schedule of withdrawal liability payments provides for one or more series of equal payments, the plan sponsor shall value each series of payments as an annuity certain in accordance with the provisions of § 4281.13.

(2) If the schedule of withdrawal liability payments provides for one or more payments that are not part of a series of equal payments as described in paragraph (a)(1) of this section, the plan sponsor shall value each such unequal payment as a lump-sum payment in accordance with the provisions of § 4281.13.

(b) Employers neither liquidated nor in insolvency proceedings. The plan sponsor shall value an outstanding claim for withdrawal liability under paragraph (a) of this section if, as of the valuation date—

(1) The employer has not been completely liquidated or dissolved; and

(2) The employer is not the subject of any case or proceeding under title 11, United States Code, or any case or proceeding under similar provisions of state insolvency laws; except that the claim for withdrawal liability of an employer that is the subject of a proceeding described in this paragraph (b)(2) shall be valued under paragraph (a) of this section if the plan sponsor determines that the employer is reasonably expected to be able to pay its withdrawal liability in full and on time.

(c) Claims against other employers. The plan sponsor shall value at zero any outstanding claim for withdrawal liability owed by an employer that does not meet the conditions set forth in paragraph (b) of this section.