22 USC 2578 – Negotiating records
(a) Preparation of records
The Secretary of State shall establish and maintain records for each arms control, nonproliferation, and disarmament agreement to which the United States is a party and which was under negotiation or in force on or after January 1, 1990, which shall include classified and unclassified materials such as instructions and guidance, position papers, reporting cables and memoranda of conversation, working papers, draft texts of the agreement, diplomatic notes, notes verbal, and other internal and external correspondence.
(b) Negotiating and implementation records
In particular, the Secretary of State shall establish and maintain a negotiating and implementation record for each such agreement, which shall be comprehensive and detailed, and shall document all communications between the parties with respect to such agreement. Such records shall be maintained both in hard copy and magnetic media.