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From https://www.fnal.gov
COPYRIGHT STATUS: Documents authored by Fermilab employees are the result of work under U.S. Government contract DE-AC02-76CH03000 and are therefore subject to the following license: The Government is granted for itself and others acting on its behalf a paid-up, nonexclusive, irrevocable worldwide license in these documents to reproduce, prepare derivative works, and perform publicly and display publicly by or on behalf of the Government.
From http://www.fnal.gov COPYRIGHT STATUS: Documents authored by Fermilab employees are the result of work under U.S. Government contract DE-AC02-76CH03000 and are therefore subject to the following license: The Government is granted for itself and others