Promulgation of rules, regulations, or orders

No rule, regulation, or order, including change, renewal, or exception thereof, shall, in the absence of an emergency, be made by the commission, except after a public hearing on at least ten days' notice given in the manner prescribed by law. The public hearing shall be held at such time and place and in such a manner as may be prescribed by the commission, and any person having any interest in the subject matter of the hearing shall be entitled to be heard.