On 1 September 1961, the Federation of Malaya signed an agreement giving Singapore the right to draw up to 86e6impgal of water per day collectively from the Tebrau River, the Skudai River, the Pontian Reservoir, and the Gunung Pulai Reservoir, with effect through 2011.
The Malaysian government has stated that the agreements were signed in a different time and that the price should increase.