The intergalactic treaty was a treaty mentioned in a message sent to the USS Enterprise in 2268. When Bele, the High Chief of the Commission on Political Traitors for Cheron, requested that the Enterprise transport him with his prisoner Lokai to their homeworld, Starfleet Command replied with a message stating that extradition without due process for any being was specifically not allowed by the intergalactic treaty. (TOS: "Let That Be Your Last Battlefield" )