The submittal must include the items and number of copies stipulated herein. The final plat shall be clearly and legibly drawn on a scale of 1" = 100'. All figures and letters shown thereon shall be plain, distinct and of sufficient size that they can be easily read. Should more than one sheet be required for the layout, there shall be included a key map showing the entire subdivision, drawn at a smaller scale, with block numbers and street names. This key map is to be included upon the first sheet or presented separately as a cover sheet the same size as the large-scale sheet.