Unfortunately no. I'm going off what his employer told him. After a quick search I found this:
"Title 18 Setcion 926(a). The peacable journey law.
TITLE 18--CRIMES AND CRIMINAL PROCEDURE
PART I--CRIMES
CHAPTER 44--FIREARMS
Sec. 926A. Interstate transportation of firearms
Notwithstanding any other provision of any law or any rule or
regulation of a State or any political subdivision thereof, any person
who is not otherwise prohibited by this chapter from transporting,
shipping, or receiving a firearm shall be entitled to transport a
firearm for any lawful purpose from any place where he may lawfully
possess and carry such firearm to any other place where he may lawfully
possess and carry such firearm if, during such transportation the
firearm is unloaded, and neither the firearm nor any ammunition being
transported is readily accessible or is directly accessible from the
passenger compartment of such transporting vehicle: Provided, That in
the case of a vehicle without a compartment separate from the driver's
compartment the firearm or ammunition shall be contained in a locked
container other than the glove compartment or console."
I am not a lawyer and can't make heads or tales of this but several other sites have noted it and interpreted it in different ways. I am looking for someone to help me decipher this. To me it seems to read that if you are normally able to transport a weapon then it is legal as long as a state law doesn't prohibit it. What's bothering me is the encased unloaded part. What use is an encased unloaded weapon?!?