Example. A pension plan uses the calendar year as its plan year, makes its annual periodic valuation as of January 1, and uses the unit credit actuarial cost method for funding purposes. The plan is in the process of being terminated. By order of the PBGC the plan is restored as of July 1, 1991. The initial post-restoration valuation date is January 1, 1992, and a restoration payment schedule order is issued on October 31, 1992. If, as of January 1, 1992, the accrued liability of the plan is $1,000,000 and the value of the plan assets is $200,000, the initial restoration amortization base is $800,000.
26 C.F.R. §1.412(c)(1)-3