“ The water permitted by this decree to be diverted from Lake Michigan and its watershed may be apportioned by the State of Illinois among its municipalities, political subdivisions, agencies, and instrumentalities for domestic use or for direct diversion into the Sanitary and Ship Canal to maintain it in a reasonably satisfactory sanitary condition, in such manner and amounts and by and through such instrumentalities as the State may deem proper, subject to any regulations imposed by Congress in the interests of navigation or pollution control. ”

“ All the parties to these proceedings shall bear their own costs. The costs and expense of the Special Master shall be equally divided between the plaintiffs as a group and the defendants as a group in Nos. ”