Washington Revised Code Title 41. Public Employment, Civil Service, and Pensions § 41.56.060. Determination of bargaining unit--Bargaining representative

(1) The commission, after hearing upon reasonable notice, shall decide in each application for certification as an exclusive bargaining representative, the unit appropriate for the purpose of collective bargaining. In determining, modifying, or combining the bargaining unit, the commission shall consider the duties, skills, and working conditions of the public employees; the history of collective bargaining by the public employees and their bargaining representatives; the extent of organization among the public employees; and the desire of the public employees. The commission shall determine the bargaining representative by: (a) Examination of organization membership rolls; or (b) conducting an election as provided under RCW 41.56.070 or 41.56.095.

(2) For classified employees of school districts and educational service districts: