(1) No rule or regulation of any agency shall be valid as against any person until five days after such rule or regulation has been filed with the Secretary of State except for rules and regulations adopted, amended, or repealed pursuant to section 84-901.04. No rule or regulation required under the Administrative Procedure Act to be filed with the Secretary of State shall remain valid as against any person until the certified copy of the rule or regulation has been so filed on the date designated and in the form prescribed by the Secretary of State. The filing of any rule or regulation shall give rise to a rebuttable presumption that it was duly and legally adopted.
(2) A rule or regulation adopted after August 1, 1994, shall be invalid unless adopted in substantial compliance with the provisions of the act, except that inadvertent failure to mail a notice of the proposed rule or regulation to any person shall not invalidate a rule or regulation.
(3) Any action to contest the validity of a rule or regulation on the grounds of its noncompliance with any provision of the act shall be commenced within four years after the effective date of the rule or regulation.
(4) The changes made to the act by Laws 1994, LB 446, shall not affect the validity or effectiveness of a rule or regulation adopted prior to August 1, 1994, or noticed for hearing prior to such date.
(5) The changes made to the act by Laws 2005, LB 373, shall not affect the validity or effectiveness of a rule or regulation adopted prior to October 1, 2005, or noticed for hearing prior to such date.