After receipt of a petition that complies with Section 3867 of this Chapter, the state board or executive director, if acting as the state board's designee, shall give written notification to the petitioner, applicant (if not the petitioner), appropriate executive officer(s), appropriate regional board(s), and other interested persons that they shall have 20 days from the date of mailing such notification to file a response to the petition with the state board. Respondents to petitions shall also send copies of their responses to the petitioner, the applicant (if not the petitioner), and the appropriate executive officer(s). The executive director or executive officer shall file the record specified in Subsection 3867(d)(9) of this Chapter with the state board within this 20-day period. The time for filing a response may be extended by the state board or executive director, if acting as the state board's designee.