The license given to women who have proven their skankish abilities. If women are skanky enough, they attain a skank license. If the women are skanks, but stop being skanks for any reason, they will be in violation and must be told to bend over in some guys face immediately, or assume some other skank like task. It is up to skank police to enforce these laws (skank police are young males with no barometer for quality in females).
"Look at that chick with her titties all mashed together and her ass hanging out of her skirt. If she doesn't sit on that guys lap soon, she's gonna lose her skank license."