If
you are concerned about copyright, I would contact Marc directly with your questions. I've been told, but have no further information on, that there was an understanding between Marc and Mr. Sanger regarding the DGP copyright materials.
Basically Roger Sanger owns the DGP materials and copyright, but due to business disputes, the Traveller license was withdrawn for that material, and as a result all of that DGP material is no longer official canon, plus it’s unpublishable as
it stands.
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Bruce Johnson
University of Arizona
College of Pharmacy
Information Technology Group
Institutions do not have opinions, merely customs