A Company called PetaPixel has just released a set of cards that any photographer can carry around their neck which has all of yours rights as a photographer printed on them so that you can remember all those pesky laws if your ever stopped by police whilst out shooting. From the website:
The set includes three durable white balance cards connected to a lanyard with a detachable clip. 10 guidelines for photography are printed onto the back of the gray and white cards:
The front sides are blank, allowing them to be used like any other white balancing cards:
Available from PetaPixel