A representation petition may be filed by: an individual; a labor organization; two or more labor organizations acting as a joint-petitioner; an individual acting on behalf of any employee(s); an agency or activity; or a combination of the above: Provided, however, that
(a)
Only a labor organization has standing to file a petition pursuant to section 2422.1(a)(1) ;
(b)
Only an individual has standing to file a petition pursuant to section 2422.1(a)(2); and
(c)
Only an agency or a labor organization may file a petition pursuant to section 2422.1(b) or (c).