Public employee collective bargaining agreements typically contain provisions authorizing certain employees to take a leave of absence to engage in bargaining and other labor relations activities. In some cases, while on leave, an employee may continue to receive a salary from their public employer where the employer is reimbursed by the employee union.

A member of the Public Employees Retirement System (PERS), the Teachers? Retirement System, the Law Enforcement Officers and Fire Fighters Retirement System, or the Washington State Patrol Retirement System who receives compensation from a system employer while on an authorized leave of absence to serve as an elected official of a labor organization, and whose employer is reimbursed by the labor organization for compensation paid to the member while on the leave of absence, may be considered to be on paid leave for purposes of continuing to obtain service credit towards their pension benefit. The compensation reported under this provision may not exceed the salary paid to the highest paid job class that is covered under the collective bargaining agreement. 

A member of PERS plan 2 that is on an authorized unpaid leave of absence to serve as an elected official of a labor organization may receive service credit for the duration of the leave if the member, or labor organization on the member's behalf, makes both the employer and employee monthly contributions for the period of the authorized unpaid leave of absence.