Section 170 Commissioners to cause estimates to be prepared before making a rate.

The commissioners from time to time, before proceeding to make any rate which by this or the special Act, or any Act incorporated therewith, they are authorized to levy, shall cause an estimate to be prepared of the money required for the several purposes in respect of which they are authorized to levy such rate, showing the several sums required, the rateable value of the property assessable, and the rate on each pound of such value necessary to raise the money required, which estimate, after the same has been approved of by the commissioners, shall be forthwith entered on the rate book to be kept by the commissioners as hereinafter provided.