M & K Employee Solutions, Inc. v. Trustees of IAM Nat. Pension · ¶34

Petitioners argue that actuarial assumptions are factual inputs into the UVB calculation, much like hard data such as the number of plan benefciaries. On this view, to comply with § 1391, the actuarial assumptions must be “frozen” on the measurement date. Brief for Petitioners 23. In other words, they say, the actuary must use the assumptions that are “in effect” on the measurement date—i. e., the assumptions most recently adopted before the measurement date— to value the UVBs. Brief for Petitioners 37.

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