|(a) Any responsive pleading shall be filed by a party
within 10 days after filing of the pleading to which the response
is made or as ordered by the examiner.
(b) A responsive pleading to a complaint filed under
this chapter shall be filed by the respondent within 20 days of the
date of the Commission's letter notifying the respondent of the complaint.
(c) The Commissioners, the Hearings Director, or the
examiner may take action on a pleading before the deadline for filing
responsive pleadings only in an emergency that presents a risk of
imminent pollution, waste, or injury to persons or real or personal
property. Action taken under such conditions is subject to modification
based on a timely responsive pleading.