Great post!
It is very helpful to people needing service animals!
In the U.S., there are federal regulations guiding the acceptance/use of service animals, including psychiatric service animals. It's up to each individual state to adopt or reject the federal guidelines. If a state does not support/adopt federal guidelines, "test cases" may be brought to federal court for resolution.
In my state, service animals, including psychiatric are allowed in public places, Companion animals are of a different status, yet are allowed at home in rental housing to anyone in need, if presenting a prescription or letter by a qualified professional.
Thanks, Little Cat!

WC