Fees upon approval. A fee for approval of a subdivision plat of land
within the Village shall be in the amount of 15% of the amount certified
by the Village Engineer as the cost of the public improvements installed
or to be installed at the proposed subdivision. In the event that
an estimate made of such cost prior to construction shall be less
than actual expenditures, the balance of the fee resulting from such
difference shall be paid to the Village upon demand. A fee for approval
of a subdivision of land outside the Village shall be in an amount
as shall be set from time to time by resolution of the Board of Trustees.