In the interpretation and the application of the provisions
of this chapter, they shall be held to be the minimum requirements
for the promotion of the health, safety, morals and general welfare.
It is not intended to interfere with or abrogate or annul other rules,
regulations or ordinances, provided that, where this chapter imposes
greater restrictions upon the use of buildings or premises or upon
the height or bulk of a building or requires larger open spaces, the
provisions of this chapter shall apply.