Rule: `navigation` landmark: restrictions

Rule ID	Landmark 10
Conformance	Required
Definition	The `navigation` landmark must only contain `region` or `search` landmarks.
Purpose	Ensuring that the landmark structure of a page is not overly complex enables users of assistive technologies to more easily find and navigate to the desired content.
Conformance	Required
WCAG Success Criteria	Success Criterion 1.3.1 Info and Relationships Other Related Success Criterion: Success Criterion 2.4.1 Bypass Blocks Success Criterion 2.4.6 Headings and Labels Success Criterion 2.4.10 Section Headings
Rule Category	Landmarks
Rule Scope	Element
Techniques	If landmarks are needed within a `navigation` landmark, use only `region` or `search`.
Information Links	Accessible Rich Internet Applications (WAI-ARIA) 1.2 Specification: navigation role HTML5: The NAV element WAI-ARIA Authoring Practices 1.2: Landmarks W3C Web Accessibility Tutorials: Page Structure WAI-ARIA Authoring Practices 1.2: Landmark Example

Rule: navigation landmark: restrictions