Again, you are not understanding the impact of this. In both the Charlotte law, and in the decree from on high at the White House, there is ZERO requirements for a guy to be dressed in girl's clothes to use the girl's restroom. A big burly lumberjack with a huge beard in flannel and jeans could say "yep, I feel like a woman today" and use the girl's restroom.
Depending on what state you live in, your lumberjack doesn't have to feel like a woman to use the girl's restroom. Many states don't have specific laws governing the use of restrooms so he is usually doing nothing illegal. If there are complaints, he may be charged with a public nuisance crime.
This is why many people believe his law is only meant to discriminate against a small group of people who already suffer plenty of abuse. Furthermore, it is a solution in search of a problem.