premise: For example, USDA's Animal and Plant Health Inspection Service's (APHIS) web page contained a Regulations link that provides a listing of recently published rules, along with text or Adobe Portable Document Format (PDF) files allowing viewers to read the rules on line.
hypothesis: PDF is the format of choice for most of the documents on the internet, and USDA is keeping up with the times; allowing visitors to view the rules and regulations online speeds up the process of technical support.