Principle 1 Perceivable · Guideline 1.3: Adaptable
1.3.4 Orientation
Content must not be locked to portrait or landscape.
What this means in practice
Someone whose tablet is mounted to a wheelchair cannot rotate it. Forcing one orientation locks them out. Exceptions apply only where orientation is essential – sheet music, for instance.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.