621—5.7 (20) Disclaimer. Notwithstanding the provisions of rule 621—5.6(20), the board will process a valid decertification petition accompanied by an adequate show of interest as required by 621—subrule 4.3(2) at any time if the certified employee organization files a disclaimer of representation. A disclaimer of representation is a statement signed by an authorized representative of the certified employee organization, stating that the employee organization wishes to disclaim representation of the employees in the certified bargaining unit.
	 5.7(1) Upon receipt of a disclaimer and a valid petition for decertification, the board shall serve copies of the disclaimer and petition upon the employer by certified mail. The board shall prepare a public notice of proposed decision that the employee organization will be decertified and cease to be the certified representative of the employees in the bargaining unit. The public employer shall post the notice of the proposed decertification for a period of not less than one calendar week in a prominent place in the main office of the public employer accessible to the general public and in conspicuous places customarily used for the posting of information to employees. The public employer shall also have copies of the proposed decertification available for distribution to the public upon request.
	 5.7(2) Notice of the proposed decertification shall be on a form provided by the board which shall identify the parties; specify that the employee organization seeks to disclaim representation; specify the unit currently represented by the employee organization; list the names, addresses, and telephone numbers of the parties or their authorized representatives to whom inquiries by the public should be directed; and state the date by which written objections to the proposed decertification must be filed with the board and the address to which the objections should be sent.
	 5.7(3) Objections to the proposed decertification must be filed with the board by the date posted in the notice. Objections shall be in writing and shall set out the specific grounds for objection. The objecting party must be identified and provide a mailing address and telephone number. The board shall promptly advise the parties of the objections. If the objections cannot be informally resolved, they shall be resolved at hearing or the board may direct and conduct a decertification election pursuant to rule 621—5.6(20).
	 5.7(4) If no objections have been filed, or if filed and the board has determined that the objections lack substance, the board shall order the decertification of the employee organization for the unit specified. If the employee organization is decertified pursuant to this rule, no representation election involving the same employee organization and the same unit may be conducted for a period of one year from the date of decertification.