Actually, although the ADA guidelines have changed, the link posted by the OP is one of the current FAQs on the Department of Justice website. They have not updated the page yet.
Post #3 of the disABILITIES FAQs thread has a link to that same Department of Justice page (along with a number of other links about Service Dogs.). You can find the disABILITIES FAQs thread near the top of this board or follow the link in my signature.