Applications to the department regarding the selection of a bargaining representative to represent employees of a bargaining unit of an employer shall be by petition on such form or forms as may be provided by the department. A written petition may be accepted by the department if the petition contains substantially the same information required by the forms provided by the department.
Wash. Admin. Code § 296-133-080
Order 72-13, § 296-133-080, filed 7/31/72.