The regs for the center mention Title 18. Title 18 has exceptions. Please read and pay attention to section (d). Note the "other legal purposes" part. There is no case law that could be found. Again it could still cost a job but then again the law appears to make room for it. I am gonna hit up the union about it.
http://www.law.cornell.edu/uscode/18/usc_sec_18_00000930----000-.html
Good luck to you, if I said I worked there I would be a contractor, and we are second class citizens...we have no union and are there every day, day by day, by the grace of.....