The rule applies to the battery and it's location. Yes you will need a remote on/off. I used the Flaming River remote switch and mounted it near the battery but below the trunk floor and the handle portrudes thru the valance. That way if it was ever removed only the valance would have to be replaced. You can see it here just to the left of the license plate, labeled and it is a push off/pull on.
Here is a picture of the battery in the trunk. Since it is a gel cell, no vent is required. I made a simple tray, with two 3/8 inch threaded rods, and a hold down bracket over the top. The thing that is required is that the rods go through the frame rails.
The last picture is a shot of the switch as mounted below with the push/pull rod going out to the left through the valance.
Since this picture was taken the other wires were removed and it now all feeds through the one cable.The battery positive goes to one side of the switch, the battery neg. goes to a ground on the frame rail. The other side of the switch goes to the starter and another lug at that point feeds to a fuse bar/switch panel on the roll bar, from where everything else in the car is powered.
I hope that helps a bit,