Oregon Revised Statutes Public Officers and Employees § 238.442

(1) Subject to the rules of the Public Employees Retirement Board, upon commencing participation in the system a public employer that is not a school district may elect to provide prior service credit for employees of the employer who are employees of the employer on the date on which the employer commences participation. Prior service credit may be provided only for employees who are members of the system. Prior service credit under this section may be provided for continuous service by the employee to the public employer before the public employer commenced participation in the system and for any accumulated seasonal employment by an employee before the public employer commenced participation in the system. The public employer and the board shall enter into an agreement that will specify the number of years of prior service credit that employees of the employer will receive. Prior service credit under this section shall be equal to $4 for each year of prior service or major fraction of a year.

(2) If a public employer elects to provide prior service credit under this section, the board shall issue a certificate to each employee entitled to receive prior service credit. The certificate shall show the amount of prior service credit that the employee is entitled to receive under the agreement between the board and the public employer. The certificate shall be final unless the board, upon the motion of the member or upon the board's own motion, modifies the certificate for cause.

(3) Prior service credit under this section shall be funded by employer contributions in the manner provided by ORS 238.225.

(4) A public employer who agrees to provide prior service credit under this section may elect to treat any year, or part of a year, for which prior service credit is granted as a year in which the employee is an active member for the purpose of becoming vested. An election under this subsection must be made at the time the public employer enters into the agreement providing for prior service credit.