If all your fuels are moved around by electric pumps, and those pumps positively shut off when you actuate the kill switch (commonly a thumb switch, but anything that you can touch without moving hands from the bars is legal), you've met that part of the rule. If those same fuel pumps are positively shut off when the tether/lanyard switch is actuated - you've complied with that rule, too.
If you have a gravity feed system we'd like to see a manually-operated petcock controlled by one of your fingers -- say a thumbed lever connecting to a cable to a petcock, maybe even a spring loaded petcock. That "fuel" rule is especially meant for nitromethane systems, but positive shutoffs are wise anyway.
Don't forget to firesleeve unvalved lines, and don't forget to vent your nitrous blowoff to the outdoors -- preferably a long hard tube to the tail section of the bike. Label the nitrous outlet so a bystander/safety worker doesn't get a frozen finger when it blows!