Assistance Dogs International (ADI)
American-wide (US specific) Regulatory Body
Americans with Disabilities Act (ADA) is a US-wide law that explains your rights and responsibilities as a person with disabilities, including reference to service dogs.
Here is a summary sheet of the ADA laws as they apply to service and assistance dogs.
Here is a FAQ list from the ADA.
Each state may have other laws relating to service dogs. Contact your local Justice Department or Disability organizations. They should be able to refer you.
American State by State list of Laws that Apply to Service Dogs 2016
Here's the link.
Canadian Human Rights Act
Canadian Provincial Regulatory Bodies of Service Dogs
British Columbia Ministry of Justice
Alberta Human Services Act
Nova Scotia Department of Justice Draft Service Dog Guide and Service Dog Certification
A National Standard of Canada for Service Dogs
is currently under development
More Information can be found here.
What is a Service Dog Task?
A behavior that is deliberately trained and proofed that mitigates one or more specific disability of the handler. The behavior is reliable and is done on demand.
Article: Why Natural Behaviors are not Service Dog Tasks
Service Dog Tasks
Psychiatric Dog Tasks
Don't waste your money by paying these organizations for supposed 'certification' or 'registration' of service dogs. True certifying bodies need to meet you and your dog and put the team through a public access test.
http://www.freemypaws. com/ service-dogs.html
And many others!