Idea: potty license. Specifies what you're allowed to use (diapers, pull-ups, potty, toilet).
Of course you have to pass a rigorous exam to get it, and there will be caretakers and cubsitters checking your license.
— Miles After Bedtime (@ABBaxxter) December 29, 2017
This sure sounds like something interesting. Wounder how a potty license would look like?