wanted to add that here in NY (my location) service dogs are held to the same standards as non service animals.... the state of NY now requires .......all....... dogs to be licensed and wearing their licensing tag. (some locations call this registering their dogs.)

for those in NY state here is where you can get information on how to license your pet or service dog https://www1.nyc.gov/site/doh/servic...-licenses.page

other pet owners your local vet can tell you how to get your dog (pet or otherwise) licensed / registered depending upon your locations laws for dog owners of any kind of dog.