The provisions of this article 49 shall not prevent local authorities of any county, city, town, or city and county, within the reasonable exercise of the police power, from adopting rules, by ordinance or resolution, prescribing standards of sanitation, health, and hygiene for facilities that are not in conflict with the provisions of this article 49 or the rules adopted by the commissioner pursuant thereto, and requiring a local health permit for the maintenance or conduct of any such facility within the county, city, town, or city and county.