In interpreting and applying the provisions of this chapter, they shall be held to be the minimum requirements adopted for the promotion of the public health, safety, comfort, convenience and general welfare, and more particularly for the purposes set forth in §
280-2. Except as specifically herein provided, it is not intended by this chapter to repeal, abrogate, annul or in any way to impair or interfere with any existing provision of law, other than the heretofore existing Zoning Ordinance, or any rule or regulation previously adopted, or any permit, license, certificate or other authorization previously issued, granted or approved pursuant to law and not in conflict with the provisions hereof, relating to the use of buildings or land or to the erection, construction, establishment, moving, alteration or enlargement of any building or improvement; nor is it intended by this chapter to interfere with or abrogate or annul any easement, covenant or other agreement between parties; provided, however, that whenever any provision of this chapter imposes greater restrictions on the erection, construction, establishment, moving, alteration or enlargement of buildings or on the use of land or buildings in any of the districts established by this chapter than are imposed by such existing provisions of law or ordinance or by such rules, regulations, permits, licenses, certificates or other authorizations or by such easements, covenants or agreements, then the provision of this chapter shall control.