Success Criterion 2.4.3 "Focus Order" is a Level A requirement under the "operable" principle of WCAG 2.2. EN 301 549 clause 9.2.4.3 maps this criterion for procurement conformance.
Correct: DOM order matches visual order so Tab moves predictably. Incorrect: positive tabindex values or a modal rendered last-in-DOM — focus jumps erratically around the page. Never use tabindex="1" or higher — fix the DOM order instead.
Engine coverage: partially automated (audit tier 1/2) — automated findings flag candidates; a clean VPAT claim still needs the documented manual check.
Last reviewed 2026-11-02 — generated from the engine’s WCAG criterion registry.
Reading up on WCAG 2.4.3? The engine verifies this surface from the perimeter — live on sovereign EU/UK partitions.