Explanation:

• Under the Indus Water Treaty 1960, ‘Eastern Rivers’ means The Sutlej, The Beas and The Ravi taken together and ‘Western Rivers’ means The Indus, The Jhelum and The Chenab taken together.
• All the waters of the Eastern Rivers shall be available for the unrestricted use of India, except as otherwise expressly provided in the treaty.
• Pakistan shall receive for unrestricted use all those waters of the Western Rivers which India is under obligation to let flow except for domestic, non-consumptive uses, also for agricultural use, generation of hydro-electric power with limitations provided in annexures to the treaty.
• As per the treaty, India and Pakistan shall each create a permanent post of Commissioner for Indus Waters and the two Commissioners shall together form the Permanent Indus Commission.

Hence all statements are correct.