If employers participate in this system, their employees qualify for membership and must be enrolled if they meet one of the following:

• Their employment, contemplated to continue during a fiscal or calendar year, normally requires an average of 20 hours or more per week and they receive benefits normally provided as approved by the Retirement Board.
  
  
• They are classified school employees whose employment normally requires an average of 20 hours or more per week, regardless of benefits.
  
  
• They are teachers who teach half-time or more and receive benefits normally provided as approved by the Retirement Board.
  
  
• They are elected or appointed officials who earn the minimum salary required by law during the first full month of the term of office. The minimum salary is increased yearly by the Consumer Price Index.


• They are in a probationary status and meet eligibility requirements. (Probationary employees who meet eligibility requirements must be enrolled immediately.)
  
  
• They perform services through an employee leasing or similar arrangement and they meet eligibility requirements.