PDF files published on your agency’s website, are subject to Section 508 technical provisions. This website contains a list of guidance documents, checklists, and testing help to get your PDFs and other electronic documents Section 508 conformant that have been shared by other Federal agencies.
Individuals and industry also create their own tools in their efforts to make their PDFs more accessible. For example, there is a Free PDF Accessibility Checker (PAC 2). It implements 31 standard checkpoints against PDF/UA, the ISO Standard for accessible PDF files and consuming software that is included by reference in the NPRM for the Section 508 refresh. PDF/UA sets precise technical standards for accessible PDF files and establishes a high bar for tagging quality. PAC 2 was developed by, xyMedia [German], a member of the PDF/UA Competence Center.