For Orange internal accessibility requirements, we have chosen to rely on the Web Content Accessibility Guidelines v2 (WCAG 2). Those guidelines are international guidelines published by the World Wide Web Consortium (W3C) Web Accessibility Initiative (WAI) task force, which comply with the ISO standard 40500:2012.
All HTML pages made by the Orange group must comply with the AA level criteria of Web Content Accessibility Guidelines (WCAG) 2.1, without blocking point for the user after testing the main features of the site or application.
The RGAA is the French government’s General Accessibility Reference for Administrations (in French). It is meant to provide a way to check compliance against WCAG 2.1. If your are familiar with this reference, you can use it to test your site.
An English translation is available for informational purposes only.
The Accede-web site offers great manuals on web accessibility. These references are very useful, pedagogical and come from Atalan, a group of major companies as well as schools and associations of people with disabilities: