Section 4 in THE CONSTITUTION (NINTH AMENDMENT) ACT, 1960
4. West Bengal-East Pakistan Boundary Over 1,200 miles of this boundary have already been demarcated. As regards the boundary between West Bengal and East Pakistan in the areas of Mahananda, Burung and Karatoa rivers, It was agreed that demarcation will be made in accordance with the latest cadastral survey maps supported by relevant notifications and record-of-rights.
