Four pages.
When the Norks, of all people, use an EMP missile to wipe out the US’s electrical infrastructure in a single minute, there will be the guy who wrote this four page guide to restroom gender identification. He will sit, starving in his DC area apartment, listening as the bandits are scavenging and killing people in the other apartments on his floor, and not realize that he brought it on himself.
It’s too expensive to harden the grid, you see.