Leland...
Perhaps so.
But what if the building's occupant doesn't install an appliance?
In such a case you've got a building with gas in black pipe terminated in a nipple and ball valve -- not bonded to the building.
My AHJ will not accept some cheezy EGC to bond the black pipe to the GEC. Instead it must be a massive conductor sized like the water bond and structural bond.
That's not as tough as it seems. The gas SERVICE is right next to the water SERVICE. So it is but a small matter to jumper them together.
