Section 13(2)(a) in Water (Prevention and Control of Pollution) Act, 1974
(a)provide, in a case referred to in clause (a) of sub-section (1), for the apportionment between the participating States and in a case referred to in clause (b) of that sub-section, for the apportionment's between the Central Government and the participating State Government or State Governments, of the expenditure in connection with the Joint Board;