Oregon Revised Statutes Public Officers and Employees § 238.231

(1) If a participating public employer transfers employees who are members of the Public Employees Retirement System to another public employer, the two public employers must enter into a written agreement that addresses the manner in which any unfunded liability or surplus of the transferring public employer under the system will be paid or credited.

(2) If two or more public employers merge or consolidate, and any of the public employers participate in the system, the public employers that merged or consolidated must enter into a written agreement that addresses the manner in which any unfunded liability or surplus of the merged or consolidated public employers under the system will be paid or credited.

(3) If a participating public employer splits into two or more public employers, the public employers that result from the split must enter into a written agreement that addresses the manner in which any unfunded liability or surplus of the original participating public employer under the system will be paid or credited.

(4) A written agreement entered into under this section must be delivered to the Public Employees Retirement Board not later than 60 days after the transfer, merger, consolidation or split becomes effective. If public employers affected by a transfer, merger, consolidation or split, including public employers created by a merger, consolidation or split, fail to deliver to the board a written agreement that addresses the unfunded liabilities or surpluses, or fail to deliver to the board a written agreement that addresses the unfunded liabilities or surpluses in a manner satisfactory to the board, the board shall decide the manner in which unfunded liabilities or surpluses will be allocated among the public employers.