In their interpretation and application, the
provisions of this chapter shall be held to be minimum requirements
adopted for the promotion of the public health, morals, safety or
the general welfare. It is not intended to interfere with, abrogate
or annul other rules, regulations or ordinances, provided that whenever
the requirements of this chapter are at variance with the requirements
of any other lawfully adopted regulations, rules or ordinances, the
most restrictive or those which impose the highest standards.