2 articles
Protocol (diplomacy)
Protocol (diplomacy): a formal international agreement with the same legal force as a treaty, usually less formal in name or supplementary to a parent convention; types include Protocol of Signature, Optional Protocol, and Protocol to Amend, exemplified by the Montreal Protocol.
Protocol (treaty)
A protocol, in international law, is a treaty instrument that supplements, amends, or extends a parent treaty; the name carries no fixed legal weight, as with the 1987 Montreal Protocol.