Another key goal of this update is to promote consistency with other requirements in the United States and abroad in order to improve accessibility and to facilitate compliance. A leading reference, the Web Content Accessibility Guidelines (WCAG), is incorporated into the rule and applied to web-based content as well as to offline documents and software.

Read more at
http://www.accessibilitynewsinternational.com/u-s-access-board-releases-proposed-updated-accessibility-requirements-for-information-and-communication-technology-ict/