Here in Mexico It´s the law
I am sure that it is not the law in many African countries, some southeast Asia countries, certain central American and South American countries, and a few Middle Eastern countries I care not to mention. However, I am attempting to compile this list, and as you say, how are the laws enforced, or not.
So, if anybody is out there, please respond. It is much easier than seaching the net for this stuff.
a better question might be "where it is NOT the law" and also impressions of how well it is enforced.