2200.20—Party status.
        
        (a) Affected employees.
         Affected employees and authorized employee representatives may elect party status concerning any matter in which the Act confers a right to participate. The election shall be accomplished by filing a written notice of election at least 10 days before the hearing. A notice of election filed less than 10 days prior to the hearing is ineffective unless good cause is shown for not timely filing the notice. A notice of election shall be served on all other parties in accordance with  § 2200.7.
    
    
        
        (b) Employee contest.
         Where a notice of contest is filed by an employee or by an authorized employee representative with respect to the reasonableness of the period for abatement of a violation, the employer charged with the responsibility of abating the violation may elect party status by a notice filed at least 10 days before the hearing. A notice filed less than 10 days prior to the hearing is ineffective unless good cause is shown for not timely filing the notice.