An urban authority may divide their district into parts for all or any of the purposes of this Act, and may vary or discontinue any such division.
Where a district is divided into parts under this section, the authority in making and levying rates shall charge separately on each of those parts all expenses incurred in respect of that part for the purpose or purposes for which the division was made, and such share as the authority may deem equitable of any expenses, including loan charges, properly attributable to that part in common with any other part or parts of the district.