General and special rules may be adopted, amended or rescinded by the Commission only after public hearing or opportunity to be heard thereon, of which proper notice has been given. Such notice shall be given by mail to the secretaries of the various commercial, business and trade organizations of the State who keep on file with the Commission their names and addresses for the purpose of receiving such notices. General rules shall become effective ten days after filing with the Secretary of State and publication in one or more newspapers of general circulation in this State. Special rules shall become effective ten days after notification to or mailing to the last known address of the individuals or concerns affected thereby. Regulations may be adopted, amended or rescinded by the Commission and shall become effective in the manner and at the time prescribed by the Commission.