(2) Special rule in case of subsequent finding of inability to pay guaranteed benefits. In any distress termination proceeding under
section 4041(c) of ERISA and part 4041 of this chapter in which (as described in
section 4041(c)(3)(C)(ii) of ERISA), after a determination that the plan is sufficient for benefit liabilities or for guaranteed benefits, the plan administrator finds that the plan is or will be insufficient for guaranteed benefits and the PBGC concurs with that finding, or the PBGC makes such a finding on its own initiative, actuarial present values shall be determined as of the date of the notice to, or the finding by, the PBGC of insufficiency for guaranteed benefits.