ORS § 237.980
During the entire period of liquidation of the Public Employees Retirement System, the right of a person to a pension, annuity or a retirement allowance, to the return of contributions upon separation from service with a public employer, the refund of contributions authorized by ORS 237.976, the payment of annuity, or retirement allowance itself, any optional benefit or death benefit, or any right accrued or accruing to any person under the provisions of the repealed Public Employes' Retirement Act [chapter 401, Oregon Laws 1945] or ORS 237.412 to 237.418 or 237.950 to 237.980, shall be exempt from all state, county and municipal taxes, and shall not be subject to execution, garnishment, attachment or any other process or to the operation of any bankruptcy or insolvency law, and shall not be assignable.
ORS 237.980