(1) State and local health officers or their designees shall conduct investigations and inspections of establishments.
(2) State and local health officers or their designees must be provided access to establishments at all reasonable hours for the purpose of conducting investigations and inspections as required under subsection (1).
(3) If a local board of health inspection and regulatory program is being operated in lieu of a department program, the local board of health and not the department has the duty and authority provided in this section.