WCAG 3.0 is an active W3C Working Draft in development by the AGWG. Requirements, assertions, the conformance model and reporting tiers are still being developed and may change. The latest published draft is the 10 September 2026 Working Draft; this site follows the editorsโ draft, which also includes exploratory provisions.
developingSupplemental requirement
Media Alternatives Controllable
Group: user-control • Guideline: media-control
Summary in Plain English
The viewer, not the page, decides whether closed captions and audio descriptions are playing, and can change that at any point.
Why It Matters
Which alternative helps depends on the viewer. Control is what lets people sharing a screen, or with different needs, use the same media.