(1) In proceedings on a petition for "decertification" under WAC 391-25-070 (6)(c) or 391-25-090(2), the parties shall not be permitted to remove positions from or add positions to the existing bargaining unit;

(2) An organization which files a motion for intervention under WAC 391-25-190 shall not be permitted to seek a bargaining unit configuration different than proposed by the original petitioner.

(3) If petitions filed by two or more organizations under this chapter are pending before the agency at the same time and involve any or all of the same employees, the timeliness of the respective petitions and the sufficiency of the respective showings of interest shall be determined separately and the proceedings shall be consolidated for resolution of all issues concerning the description(s) of the bargaining unit(s). A petition filed after the issuance of a notice of election in another proceeding under WAC 391-25-430 or after the commencement of a cross-check in another proceeding under WAC 391-25-410 shall be dismissed as untimely.

(4) A party to proceedings under this chapter shall not be permitted to propose more than one bargaining unit configuration for the same employee or employees, except where a merger of bargaining units is proposed under WAC 391-25-420.

(5) Where a petitioning union seeks severance of a portion of an existing bargaining unit of classified employees at a school district or educational service district, appropriate bargaining units existing on July 25, 2005, may not be divided into more than one appropriate bargaining unit without the agreement of the employer and certified bargaining representative of the unit where severance is sought.