13.4—Public participation in rulemaking.
(a) Written comments.
Interested persons will be afforded an opportunity to participate in a rulemaking proceeding of which notice has been given pursuant to § 13.3 of these rules through the submission of statements, information, opinion, and arguments in the manner stated in the notice.
(b) Hearings.
When required or permitted by law the Commission may hold hearings in connection with a rulemaking proceeding at which interested persons may be heard, either by oral presentation or upon written submission, and may adopt such procedures as in its judgment will best serve the purpose of the rulemaking proceeding.