Public Law No: 112-154 on Public Access Issues
only states that covered Service Dogs must be approved by an appropriate accrediting body while not stating any specific group as approved.
Under The Dept. of Veterans Affairs (VA) in a final rule on 09/05/12 addressing Benefits
there were two approved accrediting agencies named -- Assistance Dogs International (ADI) and International Guide Dog Federation (IGDF).
Dept of Veterans Affairs, 38 CFR Part 17 -- Benefits
Since both Access Issues and Benefits on the topic of Service Dogs were in the news at the same time there was a lot of confusion going on in the general public and by veterans and various other groups during this time period.
Website Links of Approved Accrediting Agencies:
Assistance Dogs International : Assistance Dogs International : Setting standards for the assistance dog industry since 1987
International Guide Dog Federation Home Page