They also agreed, in preparation for this new project, that the United States would be heavily involved in the Mir project in the years ahead, under the code name "Phase One" (the construction of the ISS being "Phase Two").
Aftalen indebar også, at som forberedelse til dette projekt, ville USA blive meget involveret i Mir-programmet i de kommende år under kodenavnet Fase Et (konstruktionen af ISS var Fase To).