In interpreting and applying this chapter, the requirements contained herein are declared to be the minimum requirements for the protection and promotion of the public health, safety, morals, comfort, convenience and general welfare and to prevent the unrestricted use of signs. This chapter shall not be deemed to affect in any manner whatsoever any covenants or other agreements between parties; provided, however, that where this chapter imposes a greater restriction upon the use of buildings or land or upon the erection, construction, establishment, moving, alteration or enlargement of buildings than are imposed by other ordinances, rules, regulations, licenses, certificates or other authorizations or by easements, covenants or agreements, the provisions of this chapter shall prevail.