Tasks which block WCAG Level A conformance. The task should describe the exact clause which was violated.
The task should also give the version of the WCAG specification which is referenced. WCAG 2.1 is the latest W3C recommendation. WCAG 2.1 is backwards-compatible with WCAG 2.0 in the sense that WCAG 2.1 conformant products at a certain level will also be WCAG 2.0 conformant at the same level.
See also: