After January 9, 1973, no building or land shall be used or occupied and no building or part thereof shall be erected, moved, or altered, unless in conformity with the regulations herein specified for the district in which it is or is to be located. No more than one principal use per lot shall be permitted except as provided herein.

No building or structure shall be erected, moved or altered after January 9, 1973, so as to exceed the height limit that is specified in section 82 herein for the district in which it is located, except for the following buildings and structures:

52.1. Churches, schools, hospitals, sanitariums and other public and semipublic and public utility buildings. There shall be no restriction on the height on such buildings, provided the front, side, and rear yards required in the district in which such building is to be located shall be increased an additional one foot for each one foot that the building exceeds the maximum height permitted in the district.

52.2. Barns, silos, grain elevators, or other farm structures; belfries, cupolas and domes; monuments; water towers; transmission towers, windmills, chimneys, smokestacks; flag poles; radio towers, masts and aerials.

52.3. Bulkheads, watertanks, and scenery lofts and similar structures provided that such structures shall not cover more than 25 percent of the total roof area of the building on which such structures are located.

52.4. None of these exceptions to height limits shall apply to signs or outdoor advertising signs or poster panels, which shall be subject to all height limitations of the district in which they are located.

No lot, even though it may consist of one or more adjacent lots of record, shall be reduced in size so that lot width or depth, front, side, or rear yard, inner or outer court, lot area per family, or other requirements of these regulations are not maintained. No building shall be constructed after January 9, 1973, on a lot which does not have a minimum frontage of 30 feet on a street. This section shall not apply when a portion of the lot in question is acquired for public purpose.

53.1. All lots in any R-AG or RR-1 district on a road with open ditches shall have a minimum lot frontage of the right-of-way, provided that the building line setback is not more than 100 feet from the front property line. However, any lot submitted for approval by itself in an R-AG or RR-1 district and not on a previously approved subdivision which is five acres or more with one dwelling may be approved if there is fee simple ownership access to a county road which fronts at least 30 feet on said county road. Said access shall not be included in the main body of the lot for purposes of determining lot size; and shall be at least 30 feet wide at all points.

No part of a yard or open space, or loading space, or off-street parking space about any building, required for the purpose of complying with the provisions of this resolution shall be included as part of a yard, or off-street parking, or loading space, or open space similarly required for another building. Every part of a required yard or court shall be open from its lowest point to the sky unobstructed, except for the ordinary projections of sills, cornices, buttresses, ornamental features, chimneys, flues, and eaves, provided such projections shall not extend more than two feet beyond the yard area requirements.

No building shall be erected, moved, or altered after January 9, 1973, so as to accommodate or house a greater number of families than is specified in the regulations herein for the district in which the building is or is to be located.