The DD Facility Advisory Board established under § 2-204 of the ID/DD Community Care Act shall advise the Department of Public Health on all aspects of its responsibilities under this Act, including the format and content of any rules adopted by the Department of Public Health. Any such rules, except emergency rules adopted pursuant to Section 5-45 of the Illinois Administrative Procedure Act, adopted without obtaining the advice of the DD Facility Advisory Board are null and void. If the Department fails to follow the advice of the DD Facility Advisory Board, the Department shall, prior to the adoption of such rules, transmit a written explanation of the reason therefor to the DD Facility Advisory Board. During its review of rules, the DD Facility Advisory Board shall analyze the economic and regulatory impact of those rules. If the DD Facility Advisory Board, having been asked for its advice, fails to advise the Department within 90 days, the rules shall be considered acted upon.