Just finished googling the site. I have no idea what you googled. Here are some of the things they do talk about:
Genetics
Bloodlines
Breed Standard
General Info,
Schcuthund and should those dogs be used as service dogs
Guide dogs, Service dogs, therapy dogs PSD dogs (which is why it is called PsychiatricService Dog Information) etc You can learn everthing you want to know about service dog laws, and anything you don't find they will answer .

I just don't know what you googled, but that site has all the info on all the laws you could want re service dogs. It is a professional site, no fooling around. They are waiting for a decision on the Cave boy's dog right now.
So you can include hearing aid dogs also.