In interpreting and applying the provisions of this Chapter, they shall be held to be the minimum requirements for the promotion of the health, safety, morals or general welfare. Whenever this Chapter requires greater width or size of yards, courts or other open spaces or requires a lower height of buildings or a less number of stories or requires a greater percentage of lot to be unoccupied or requires a lower density of population or requires a more restricted use of land or imposes other higher standards than are required in any other Statute, local order or regulation, private deed restrictions or private covenants, the regulations made under authority of this Chapter shall govern.

With respect to subdivision plats approved by ordinance for residential use prior to the adoption of this Chapter, building permits may be issued and improvements may be constructed on lots within the platted subdivision, although said lots and the subdivision plat thereof do not comply with the lot area per family requirements of this Chapter, provided the platted lots comply with the lot area per family requirements in effect at the time of ordinance approval and, provided further, that the development of the lots comply with all other provisions of the present zoning classification.