The final plat shall have incorporated therein all modifications or amendments required by the Planning Commission and confirmed by Council; otherwise, it shall conform to the proposed plat as approved and all requirements of the Subdivision Control Act. However, only that portion of land included in the proposed plat which the subdivider proposes to record and develop at that time may be included in the final plat at the option of the subdivider, provided that such portion makes possible progressive approval of contiguous additional portions satisfactory to the Planning Commission and Council and conforms to all of the requirements of these Subdivision Regulations. In the latter case, the subdivider shall file a written application for an extension of time on that portion of the subdivision not included in the final plat as indicated in Section 1244.12. The final plat shall contain and include at least the following:
(a) Form of Map. The form of the final plat map shall be as specified in the Subdivision Control Act.
(b) Information. The map shall contain at least the information required by the Subdivision Control Act.