Upon direction of the Commission the Executive Director shall, and in all other instances, the Executive Director may require a possible violator to show cause before the Commission why a penalty should not be assessed in accordance with the provisions of these rules and section 14.17 of the Compact. The notice to the possible violator shall:

(a) Set forth the date on which the possible violator shall respond; and

(b) Set forth any information to be submitted or produced by the possible violator.