Oregon Revised Statutes Public Officers and Employees § 238A.220

(1) A participating public employer shall make employer contributions to the Public Employees Retirement Board at intervals designated by the board in the amounts determined by the board under ORS 238.225. All participating public employers shall be considered to be a single employer for the purposes of the employer contributions under ORS 238.225 that are required for funding the pension program established under ORS 238A.025.

(2) For the purpose of the actuarial computation required under ORS 238.225, the board shall separately establish the liability of participating public employers for police officers and firefighters under the pension program and shall require that public employers that employ police officers and firefighters who are members of the pension program make contributions for those employees based on the liability established under this subsection.