The petition shall: (i) include such facts as necessary to demonstrate that the petitioner is aggrieved or has an interest that is or may be adversely affected; (ii) state the issues proposed for review, citing to the record where those issues were raised or explaining why such issues were not required to be raised during the public comment process; and (iii) explain why the Agency's previous response, if any, to those issues is (A) clearly erroneous or (B) an exercise of discretion or an important policy consideration that the Board should, in its discretion, review.
The Board shall hold a hearing upon a petition to contest the decision of the Agency under this paragraph (a)(2) unless the request is determined by the Board to be frivolous or to lack facially adequate factual statements required in this paragraph (a)(2).
The Agency shall appear as respondent in any hearing pursuant to this subsection (a). At such hearing the rules prescribed in Section 32 and subsection (a) of Section 33 of this Act shall apply, and the burden of proof shall be on the petitioner.
415 ILCS 5/40.3