Within the corporate limits of the city, there shall be issued only one permit for one well in each one-half platted block or one well in any parcel or combination of parcels of land equal in area to no less than one-half of the entire area of the block in which such parcel or parcels of land are situated; provided, however, that in any platted block containing more than four acres, a permit may be granted for an additional well in such block for any additional area containing no less than two acres; and provided further, that where any block, as platted, is divided by alleys into more than two parts, then a permit for one well may be granted for each and every part of such block; and provided further, that where more than one well has been heretofore drilled or commenced in any one-half block, then an additional permit or permits may be issued for the drilling of a well or wells to offset the well or wells heretofore so drilled or commenced; provided, that such offset well or wells shall be located in the same block as the well or wells to be offset, or within two hundred (200) feet of such block; and provided further, that where more than one well shall be drilled beyond the city limits line, and within four hundred (400) feet thereof, on land either immediately adjacent to any platted block or unplatted tract within the city, or separated therefrom by a street, alley or highway, then a permit may be issued for the drilling of an additional well in said block or tract, at a location not more than two hundred (200) feet from the city limits line, to offset the additional well or wells that shall be so drilled on said land situated outside the city; and provided further, that where more than one producing oil or gas sand shall be found in any block a permit may be granted for one well to each of such sands for the same area or areas as hereinabove defined. (Prior code § 28-1-2)