Following the reorganisation of the state of Punjab in 1966, Haryana State was created. This was followed by a notification by the Government of India dated 24 March 1976 allocating the surplus waters between Punjab and Haryana in due consideration of the powers conferred by Sub Section (I) of Section 78 of the Punjab Reorganization Act, 1966 (31 of 1966). The allocation was challenged in the Supreme Court by Haryana. A tripartite agreement followed on 31 December 1981, based on the revised mean annual flows from the flow series of 1921–60 assessed as —including prepartition use of and transit losses in the Madhopur Beas Link of —vis-a-vis the figure of assessed in earlier allocation, which was based on the flow series of 1921–45. The revised assessed surplus supplies of (from flow and storage) was allocated as: