Websites and applications include any electronic resource that is delivered via HTTP or HTTPS, and any other technologies used in the retrieval, delivery, or presentation of the resource, as described by the United States Access Board in “Text of the Standards and Guidelines - United States Access Board”:

  1. Websites and applications, including all content, documents, and interfaces must conform to the Web Content Accessibility Guidelines (WCAG)  2.0., as incorporated in the Section 508 ICT Refresh Final Rule, published January 18, 2017 with corrections published on January 22, 2018.
  2. Websites and applications must conform to HTML5 and ARIA Techniques as described in the OpenAjax Evaluation Library and Rulesets.
  3. Websites, applications, and other resources must provide a well-labeled, accessible link so that users can contact to a person responsible for the resource.
  4. Websites and applications must be interoperable with appropriate assistive technologies, such as screen readers; all instructions, contextual cues, and dynamic actions must be effectively communicated to the user.

Web Content Accessibility Guidelines 2.0

The Web Content Accessibility Guidelines (WCAG 2.0) are a worldwide standard for creating and testing accessible websites and applications. The full WCAG 2.0 specification is located at http://www.w3.org/TR/WCAG20.

"How to Meet WCAG 2.0: A customizable quick reference to Web Content Accessibility Guidelines 2.0 requirements (success criteria) and techniques" is a convenient reference for developers and others interested in understanding web accessibility. It is located at http://www.w3.org/WAI/WCAG20/quickref/.