(a) As authorized by the Wyoming Administrative Procedure Act, any person or agency may be admitted as a party to a proceeding before the Board if entitled as of right to do so. Upon timely application, any applicant, may be permitted to intervene in a case:
(b) Any applicant, desiring to intervene shall file an application to intervene with the Board and serve a copy on all parties in the case. The application shall state the grounds therefore, set forth the position for which intervention is sought, and advise the parties that should they wish to contest the application they must file with the Board and serve on all parties and the applicant a written response within fifteen (15) days of service of the application. No application to intervene shall be filed within twenty (20) days of a hearing.
211-2 Wyo. Code R. § 2-14