Original sentence: The vehicle and its test program would violate the Partial Test Ban Treaty of 1963 as currently written, which prohibited all nuclear detonations except those which were conducted underground, both as an attempt to slow the arms race and to limit the amount of radiation in the atmosphere caused by nuclear detonations
Edited sentence: It is known now that there is already much radiation in space, enough that the additional radiation from project Orion would be comparatively minor.It is possible, now that their influence has diminished, that an amendment to provide this exception could be added to the treaty, assuming all signers agree to amendment.Some people argue that this treaty is based on outdated assumptions, however.The vehicle and its test program would violate the International Test Ban Treaty of 1963 as currently written