(a) Notice under Sec. 13.3 and public participation under Sec. 13.4 shall not be required when persons subject to the rules are named and are either personally served or otherwise given actual notice of proposed rulemaking in accordance with law.
(b) Except when notice or hearing is required by statute the provisions of Sec. Sec. 13.3 and 13.4 shall not apply:
(1) To interpretative rules, general statements of policy, or rules of agency organization, procedure or practice; or
(2) When the Commission for good cause finds (and incorporates the finding and a brief statement of reasons therefor in the release issued) that notice and public procedure thereon are impracticable, unnecessary, or contrary to the public interest.