Where do you go to the restroom?

Right now there is a big debate going on in this country about where transsexual people should go to the bathroom. Apparently in the South there is a belief that the bible spells out that men have to go to men's rooms and for ladies, women's rooms.  Just like the bible spelled out the need for colored bath rooms in the fifties.

I have come up with a tentative solution to the issue but it involves a new government agency, perhaps one that could be funded by a tax on toilet paper.
When a child reaches their fifth birthday, more or less the time when parents can no longer bring opposite sex children with them in the restroom, they would go to the Motor Vehicles bureau. The child would lower their trousers and a photograph would be taken. After analysis by the staff a swipe card would be sent to the family with either a blue or a pink color.

When people go to the restroom they would swipe their card at the door. If the sex of the facility matched the sex of the person, they could enter the room.

If someone wanted to change their sex, they would go back to Motor Vehicles, lower their trousers, and a clerk would determine their sex. If they didn't like their designation they could have their case adjudicated, and a determination would be available within six months. It's amazing how government intervention can solve the most difficult of problems.