Which two fundamental treaties that provide substantive law Agency Statute

The International Atomic Energy Agency Statute 1957 (IAEA) and the Nuclear Non-Proliferation Treaty 1968 (NPT) are two fundamental treaties that provide substantive law in the area of nuclear non-proliferation. These treaties work in tandem to provide a safe and expeditious means of transferring nuclear technology for peaceful purposes whilst preventing its proliferation for military use. For example, if State A wants to supply State B with nuclear material for peaceful purposes, the legal regime of the IAEA Safeguard Procedures cover it. If they attempt to transfer the technology for military purposes, the NPT explicitly prohibits them from doing so. The other way regulating the transfer of nuclear equipment is through the bilateral agreement of the states that are party to it.