(a) On receipt of a written request regarding the applicability to a specific circumstance of a regulation or the requirements for compliance with the regulation, the department or local health jurisdiction shall provide an official written determination regarding the applicability of the regulation or the requirements for compliance with the regulation to the requestor not later than the 30th day after the date the department or local health jurisdiction receives the request.
(b) An official determination made under this section is valid until the regulation that is the subject of the determination is amended by statute, department rule, or local health jurisdiction regulation.