It is called Camera Phone Predator Alert Act.
It’s an open bill that was introduced back in 2009. It has not been passed into law.
So far, this “idea” has only been suggested to a congressional committee. It is not mandatory, and may never be.
This is just another problem with everyone carrying “cameras” around. People have no idea what or whom they may take pictures of.
Me? I have been a professional photographer since 1994,