Section 2(c) in The Bihar And Uttar Pradesh (Alteration Of Boundaries) Act, 1968
(c)"deep stream" , in relation to the river Ganga or the river Ghaghra, means the deep stream thereof as verified and agreed upon by the State Governments of Bihar and Uttar Pradesh after the 30th day of September of the year preceding the year in which the appointed day falls and before the 1st day of January of the year in which the appointed day falls and in default of agreement between the State Governments, as determined by such authority as may be specified by the Central Government;
