The limits of each mobile home lot shall be clearly marked on the ground by permanent steel or iron rods driven into the ground with the top of said rods flush with the finish lot grade. Location of lot limits on the ground shall be approximately the same as shown on the accepted plans. The degree of accuracy obtainable by working with a scale of the plan and then a tape on the ground is acceptable. Precise engineering of lot limits is not required either on the plans or on the ground. This is in no way to be construed as permitting lots of a lesser size than the required minimum or in permitting lesser yard or separation dimensions than set forth elsewhere in this chapter.