The Institute of Air and Space Law (IASL) of McGill University, located in Montreal, Quebec, offers assistance to students, government authorities and the aerospace industry in the field of the legal regulation of international civil aviation and of the space applications.
The following international conventions can be downloaded from the IASL site:
Nuclear Test Ban Treaty - Treaty Banning Nuclear Weapon Tests in the Atmosphere, in Outer Space, and Under Water
Outer Space Treaty - Treaty Governing the Activities of States in the Exploration and Use of Outer Space, Including the Moon and other Celestial Bodies
Rescue Agreement - Agreement on the Rescue of Astronauts, the Return of Astronauts and the Return of Objects Launched into Space
Liability Convention - Convention on the International Liability for Damage Caused by Space Objects
Registration Convention - Convention on Registration of Objects Launched into Outer Space
Moon Treaty - Agreement Governing the Activities of States on the Moon and Other Celestial Bodies
You can also visit the Committee on the Peaceful Uses of Outer Space (COPUS) site on the United Nations at: www.oosa.unvienna.org/COPUOS/copuos.html