What is IAEA and NPT? Why India has fear to sign on it.

The International Atomic Energy Agency (IAEA) is an international organization that seeks to promote the peaceful use of nucelar energy and to inhibit its use for military operations. Though established independently of the UN under its own international treaty (the IAEA Statute), the IAEA reports to both the General Assembly and the Security council of UN and NPT stands for Non-Proliferation Treaty. IAEA is a caretaker of implementing this treaty all over the world. 194 countries already signed the treaty except India, Pakistan and Israel. This treaty actually stops the military use / development of the atomic weapons. Once a country signed on this treaty , the agency will control the atomic reactors of the company and audit the same time to time to verify the same.
The IAEA has its headquarters in Vienna , Austria.It was established as an autonomous organization on 29th July 1957. This organsiation is already bagged the Noble Peace Prize in 2005 alongwith its Director general -Mohammad ElBaradei.
its Operational liaison and regional offices are located in Geneva, Switzerland; New York, USA; Toronto, Canada; and Tokyo, Japan. The IAEA runs or supports research centers and scientific laboratories in Vienna and Seibersdorf, Austria; Monaco; and Trieste, Italy.
Now When Indian Prime minister Mr. Manmohan Singh Visited Japan for G-8 Summit for discussion in IAEA and He assure the USA President Mr. Bush that they are going to sign the draft then Left parties withdraw their support and they stated that UPA government dis not show the draft to them.