(a) Except as the Legislature may by law otherwise provide, within sixty days after the effective date of an act authorizing promulgation of a legislative rule, the agency shall promulgate the rule in conformity with the provisions of law authorizing and directing the promulgation of the rule. In the case of a rule proposed by an agency which is administered by an executive department pursuant to the provisions of article two, chapter five-f of this code, the secretary of the department shall promulgate the rule as authorized by the Legislature. In the case of an agency which is not subject to administration by the secretary of an executive department, the agency which proposed the rule for promulgation shall promulgate the rule as authorized by the Legislature.

(b) A legislative rule authorized by the Legislature is effective upon filing in the State Register, or on the effective date fixed by the authorizing act or, if none is fixed by law, a later date not to exceed ninety days, as fixed by the agency.

(c) The Secretary of State shall note in the State Register the effective date of an authorized and promulgated legislative rule and shall promptly publish the duly promulgated rule in the Code of State Rules maintained by his or her office.