After years of working around GSA (the agency that provides "handy man services" to the government) it is clear to me that they have never seen an electrical professional. This kind of legislation demonstrates that.
The federal government isn't bound to NEC or any state laws. DoD has adopted NEC in lieu of writing their own comparable code book, but as every command is its own AHJ, it's more a symbolic gesture than anything else. Gives something tangible to place in contracts, at least.
