(a) A petition for the election of an exclusive representative of a bargaining unit may be filed with the Board by:
(1) an employee organization seeking certification as an exclusive representative; or
(2) an employee, a group of employees, or an employee organization seeking a new election to determine an exclusive representative.
(b) A petition shall:
(1) contain the information the Board requires; and
(2) be accompanied by a showing of interest supported by 30% of the employees in the appropriate unit indicating their desire to be exclusively represented by the petitioner for the purpose of collective bargaining.