The Office of Treaty Affairs provides guidance on all aspects of U.S. and international treaty law and practice. The Office manages the C175 process, under which the State Department approves the negotiation and conclusion of all international agreements to which the U.S. will become a party. The Office also coordinates with the Senate Foreign Relations Committee on issues involving the Senate’s advice and consent to ratification of treaties.

Berkeley Law's Guide to treaties and international agreements. Contains useful links and guidance.