Oklahoma Administrative Code
Title 715 - Teachers' Retirement System
Chapter 10 - General Operations
Subchapter 3 - Service Eligibility
Section 715:10-3-4 - Combining fractional years of service

(a) For service performed prior to July 1, 2013, fractions of school terms performed as an active contributing member of TRS of at least one (1) school month, in different school years, may be combined to make a total of six (6) months for one (1) year of creditable service. It is not permissible to divide service rendered in one (1) year into fractional parts and combine these fractions with service rendered in two (2) or more years in order to gain additional years of service. All fractional service must be combined together before days of unused sick leave are applied to fractional service to obtain service credit. No more than one (1) year of credit will be given for all employment in any one (1) school year. However, if the member has one hundred twenty (120) or more days of unused sick leave and has ninety (90) or more days of combined work experience at the end of the school year when the member retires, TRS will grant one (1) year of service credit for the 120 days of unused sick leave and round the 90 days of work experience to count as one (1) year of service.

(b) For service performed on or after July 1, 2013, fractional service credit will be added together and the resulting sum value shall be included in the retirement formula calculations.