This is off the NHRA website.
"I have a street car that I occasionally run at the strip. I've relocated the battery to the rear. What else do I need?"
"Any car with a relocated battery must be equipped with a master electrical cutoff, capable of stopping all electrical functions including ignition (must shut the engine off, as well as fuel pumps, etc.). The switch must be located on the rear of the vehicle, with the "off" position clearly marked. If the switch is of a "push / pull" type, then "push" must be the motion that shuts off the switch, and plastic or "keyed" typed switches are prohibited. Also, the battery must be completely sealed from the driver and/or driver compartment. This means a metal bulkhead must separate the trunk from the driver compartment, or the battery must be located in a sealed, metal box constructed of minimum .024 inch steel or .032 inch aluminum, or in an NHRA accepted plastic box. In cars with a conventional trunk, metal can simply be installed behind the rear seat and under the package tray to effectively seal the battery off from the driver. In a hatchback type vehicle the battery box is usually the easiest solution, since the alternative is to fabricate a bulkhead which seals to the hatch when closed. At present, Moroso is the only company which offers an NHRA accepted plastic battery box, part number 74050"
I'll probably get the right switch eventually. Righ now I can pass tech at my local strip so I'm OK for now. Sounds like a sealed battery box is the best way to go as well. I don't know how picky the tech inspectors are at your local tracks but it is better to be safe. They are not too strict at my track. If you have something done wrong they will usually let you run as long as you fix the problem before you come back next time and it isn't a huge potential hazzard, like a leaking oil pan or something.