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 health, safety, morals and the 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.