An active, contributing member of TRS may obtain out-of-state service credit for qualified employment in public educational institutions outside the State of Oklahoma which are maintained in whole or in part by one of the states of the United States of America, the territories of the United States of America, or by a Military Dependent School operating under the Department of Defense of the United States of America, or while in the Peace Corps, providing he or she is not receiving and is not eligible to receive retirement credit or benefits from said service in any other public retirement system of this state, or any other state or territory of the United States. Qualifying employment requirements shall be the same as in the public schools of Oklahoma. Employment service deemed ineligible for membership service in Oklahoma shall not qualify for out-of-state service credit under any conditions. Time of employment and salary requirements for service credit for out-of-state shall be the same as membership service and prior service credit in Oklahoma (see subchapter 3 of this chapter). The member's out-of-state service must have been covered by and credited in the employing state's public retirement system to be eligible for service credit in TRS.
Okla. Admin. Code § 715:10-5-19