Protocolo al Tratado relativo a la neutralidad permanente y al funcionamiento del Canal de Panamá Document type Multilateral Field of application Regional/restricted Date Apr 9, 1981 Source IUCN (ID: TRE-153171) Language Spanish Subject Water Keyword Navigation International agreement-text Waterworks Geographical area Central America, North-East Pacific, North Atlantic, Latin America and the Caribbean, Arctic, East Pacific, South-Eastern Pacific, North America Full text Other Country/Territory/Participant See Expanded View Show Map Countries Entry into force Costa Rica - Panama - United States of America - reset zoom out zoom in