Oregon Revised Statutes Public Officers and Employees § 243.462

(1) The Public Employees Retirement Board may allow an eligible state employee who is participating in the state deferred compensation plan to defer compensation on an after-tax basis. The board shall establish a separate account for each employee that defers compensation on an after-tax basis, and maintain separate records for those accounts.

(2) The Public Employees Retirement Board may allow an eligible state employee who is participating in the state deferred compensation plan to convert compensation that was deferred on a pretax basis to compensation that is deferred on an after-tax basis to the extent allowed by federal law and subject to any requirements of federal law for the conversion.