The cost of constructing joint district sewers, except the sum, if any, specified in the ordinance to be paid by the city, shall be assessed and paid in special tax bills against the property included in the joint sewer district, the same as is provided in the case of district sewers. The action of the council creating the joint sewer district shall be conclusive as to the necessity therefor, and no special tax bills shall be held invalid or be affected on account of the included drainage area thereof, or the size, character or purpose of such sewer; provided, it shall not include any district not contained in its natural drainage area or watercourse.

(Code 1964, § 14.720)

     Cross reference(s)--Licenses, permits and miscellaneous business regulations, Ch. 13; taxation, Ch. 26.