The regulations within each district, as set by this chapter, shall be minimum regulations and shall apply uniformly to each class or kind of structure or land, and particularly, except as hereinafter provided:
1. No building, structure, or land shall hereafter be used or occupied, and no building or structure or part thereof shall hereafter be erected, constructed, reconstructed, moved, or structurally altered except in conformity with all the regulations herein specified for the district in which it is located.
2. No part of a yard or other open space or off-street parking or loading space required about or in connection with any building for the purpose of complying with this chapter shall be included as part of a yard, open space, or off-street parking or loading space similarly required for any other building.
3. No yard or lot existing at the time of passage of the zoning ordinance codified in this chapter shall be reduced in dimension or area below the minimum requirements set forth herein. Yards or lots created after the effective date of such ordinance shall meet at least the minimum requirements established by this chapter.
Whenever the requirements of this chapter are at variance with the requirements of any other lawfully adopted rules, regulations, ordinances, deed restrictions, or covenants, the most restrictive or that imposing the higher standards shall govern. All structures existing as of the effective date of the zoning ordinance, and which do not comply with the terms and conditions of this chapter, shall be considered lawful and shall be allowed to continue and exist or be reconstructed as they currently exist.