Each mobile home site pad shall be constructed of Portland cement concrete and shall have a length of not less than forty (40) feet. The pad shall consist of either two (2) strips, each one with a width of not less than three (3) feet and with a distance between them such that a mobile home can be maneuvered on the strips, or, one (1) strip not less than twelve (12) feet in width, and of sufficient length to extend from the rearmost wheels to and including the tongue.