Oregon Revised Statutes Labor and Employment; Unlawful Discrimination § 659.860

(1) The right of a person to an annuity, a retirement allowance, or benefit, or to the return of contributions, or to any optional benefit or any other right accrued or accruing to any person under the provisions of Articles 1, 3 or 5 of this chapter;  the system;  and the monies in the system created by such articles, are hereby exempt from any state, county or municipal ad valorem taxes, income taxes, premium taxes, privilege taxes, property taxes, sales and use taxes, or other taxes not so named, notwithstanding any other provision of law to the contrary, and exempt from levy and sale, garnishment, attachment or any other process whatsoever, and shall be unassignable except as specifically otherwise provided in Article 1, 3 or 5 of this chapter effective January 1, 1988, and except as otherwise provided in subsection (2) of this section.

(2) Any retired member or beneficiary receiving a retirement allowance or benefit under Article 1, 3 or 5 of this chapter may authorize the Public Employees' Retirement System to make deductions from the retirement allowance or benefit for the payment of employer or system sponsored group life or health insurance.  The deductions authorized under this subsection shall be subject to rules and regulations adopted by the Board of Trustees of the Public Employees' Retirement System.