(c) With each increase in allowable map scale the number of modular units is multiplied by four. Each new modular unit is a quarter of the area represented by the previous allowable smaller map scale.

1. (1) Four modular units are required at a scale of one inch equals 200 feet to cover the area of the basic modular unit at one inch equals 400 feet. Sixteen modular units at a scale of one inch equals 100 feet, and 64 modular units at a scale of one inch equals 50 feet are required to cover the area of the basic modular unit at one inch equals 400 feet.
2. (2) The basic modular unit section number shall be suffixed with a two-digit number when the scale of mapping is enlarged. The suffix number must be unique for each scale of mapping and shall be: 01 to 04 at a scale of one inch equals 200 feet, 05 to 20 at a scale of one inch equals 100 feet, and 21 to 84 at a scale of one inch equals 50 feet.
3. (3) The suffixes shall be assigned to the smaller modular units of the basic one inch equals 400 feet modular unit by numbering from left to right starting with the top row of the smaller modular units.

(e) On each section map shall be shown:

1. (1) Land parcel boundary lines.
2. (2) City, town, village, school and special district boundary lines with designations.
3. (3) Land parcels under one acre must show all lineal dimensions, land parcels over one acre must show the frontage dimensions; where the dimensions are scaled or measured, they shall be so indicated.

4. (4) Land parcels containing one acre or more must show the acreage; computed acreage must be compared to the acreage indicated in the instrument of conveyance with the following sliding tolerance scale: If the computed acreage exceeds the tolerance, then both the conveyance and computed acreage must be shown. Computed acreage shall be shown to one tenth of an acre and shall be indicated with the letter “(c).”

   1. (i) one to five acres—ten percent difference;
   2. (ii) five to 20 acres—eight percent difference;
   3. (iii) 20 to 50 acres—six percent difference;
   4. (iv) over 50 acres—four percent difference.
5. (5) Public streets, public roads and highways including important private roads.
6. (6) Major railroads and public utility rights-of-way.
7. (7) Major bodies of water such as rivers, streams, ponds, canals and lakes.
8. (8) Identification by popular name of all wholly exempt property.
9. (9) Parcel number.
10. (10) The north arrow.
11. (11) Coordinate indications and their readings must be shown for the four corners of the modular unit.