A.
The preliminary layout and the supporting documents for a proposed subdivision constitute the material to be officially submitted to the Village Planning Board, and later one copy shall become the official record of the Village Clerk. They show the general design of the subdivision and its public improvements so that the Planning Board can indicate its approval or disapproval of the subdivision prior to the time that the final plat, including the design and detailing of the public improvements and utilities, is completed. Approval of the preliminary layout does not constitute an approval of the final plat nor should it be considered a valid basis for the construction of site improvements or for other commitments which depend upon its design characteristics.
B.
When revision of the proposed subdivision is required, the preliminary layout shall be revised accordingly so that the files of the Planning Board and other Village officials will be current.
C.
The preliminary layout shall serve as a key map to subdivisions subsequently laid out in sections on final plats.