Sue will provide the laws I'm sure, but no there is not registration, no certification and vest or harness, nothing is required by law to have a service dog. An owner of the business can ask, is that a service animal, and what service does he do, if a person does not know, you can say anything and that is all they can ask.the problem is, the owner asks, but are afraid to say no, what if it is a service animal and a law suit accors,but then again I would say we already live in a country that 2/3 of service dogs are not true service dogs not by definition. I went to a school in ny, 28 days to get my guide dog, paid nothing, others have to train dog the self, I don't want to take that away from them, since mine is free and mine is well trained by experts but it does leave a huge mess for those who do not really have service dogs. What made it worse was when a federal agency HUD declared that federally a companion dog is to be treated the same in a rental, meaning no security deposits and only a doctors note was needed to prove that an elderly or disabled needed a companion. If you ask these elderly or disabled they will tell you there dog is a service animal, but by law they are not. Honestly it is a mess. Blind since the age of four, had a dog now almost 9 years, the first time I was asked what service my dog does, I went dumb, could not answer. I spit out he is my eyes, no that is not a service, I really had to think, he now she gets me form point a to point b safely, she leads me around tree branches, she stops me before I fall off curbs or walks into traffic, but in reality, I lead her, she won't move unless commanded to, she won't step in the street even if clear until I tell her to. But she is disobedient in a situation when I give her a command and she sees danger. The new hybrid cars have no sound, if I tell her to walk and she sees a car in the road she will disobey me even if I get demanding and correct her. Disney has lots and lots of people claiming service dogs that are unservicea dogs. So doesn't home deposit and Walmart and the public bus system. Disabled have not fought it because we do not want to take away the service of free dogs to those disabilities that need them. My school now does autism dogs, but you have to live within 2 hours because the training is so different, but at least it is free. My school also has buddy dogs, dogs for children who are blind and not old enough for a dog but know they want one as an adult. They learn what it is like to have a two year old tied to your ankle your whole life, I love my dog but really that is what he is a two year old except when working and boy to keep him happy I have to walk, 3.7 miles every other day, and still she can not do Disney. Your turn sue, I don't have the whole law.