Oregon Revised Statutes Public Officers and Employees § 238A.460

(1) The Public Employees Retirement Board, the director employed by the board and staff employed by the board may not adopt any rule or take any administrative action that has the effect of increasing the total liability for benefits under this chapter that is in excess of one-tenth of one percent.

(2) Subsection (1) of this section does not apply to any rule or administrative action necessary to maintain qualification of the Public Employees Retirement System and the Public Employees Retirement Fund as a qualified governmental retirement plan and trust under the Internal Revenue Code and under regulations adopted pursuant to the Internal Revenue Code.