Overview Conventions To which major air law treaties is your state a party? Switzerland is a party to the Rome Convention (1933), the Chicago Convention (1944) and the Geneva Convention (1948), as well as the Warsaw Convention (1929) and the Montreal Convention (1999). The Cape Town Convention (2001) and its Aircraft Protocol have been signed but not yet ratified by Switzerland. Switzerland joined the Multilateral Agreement on Commercial Rights of Non-Scheduled Air Services in Europe (1956).