The most common change has been where employers, seeking to reduce contributions to the pension fund, adjust certain assumptions used in an actuarial funding method
or change the method itself.
Current liability" is all liabilities to participants and beneficiaries under the plan, determined as if the plan terminated; it represents only benefits accrued to date, and does not depend on the actuarial funding method
Specifically, the plaintiffs successfully challenged the state legislature's attempt to change from the aggregate cost method (AC) to the projected unit credit method (PUC) as the actuarial funding method used to determine the annual contributions to be made by New York public employers to the CRF.
Nonetheless, the legislature enacted Chapter 210 of the Laws of 1990, which mandated 1) changing the actuarial funding method from the AC method to the PUC method and 2) establishing a five-year stock valuation smoothing method as opposed to the four-year method for which the comptroller had opted.
Currently, employers may use any one of six acceptable actuarial funding methods
for purposes of calculating OPEB expense.
For financing purposes, public-sector employers have tended to favor actuarial funding methods
that produce annual contribution amounts that can be expected to remain relatively constant over time as a percentage of payroll.