All regular employees of the public schools operated by and for the state of Oklahoma are eligible to become members of the TRS, subject to the following restrictions:
- Regular employees are those working 20 or more hours per week, with assigned duties and responsibilities, who is treated by all standard conventions as an employee of the school and receives compensation commensurate with the responsibilities of the position. Temporary, seasonal, supplemental and other employees employed on a limited or short-term basis are not regular employees and thus ineligible.
- Regular employees receive payment for service by a school or state warrant, recorded on a warrant register with standard payroll deductions, and receive benefits generally provided to other regular employees.
- The minimum requirement of 20 hours per week shall be determined by the actual time the employee is required to be present at the place of employment.