Accessibility Conformance Testing (ACT) Rules Format 1.1 is now a W3C Recommendation

The Accessibility Guidelines Working Group published Accessibility Conformance Testing (ACT) Rules Format 1.1 as a W3C Recommendation. ACT Rules Format defines a format for writing accessibility test rules. The test rules can be used for developing automated testing tools and manual testing methodologies. This document provides a common format that allows anyone involved in accessibility testing to document and share their testing procedures in a robust and understandable manner. This enables transparency and harmonization of testing methods, including methods implemented by accessibility test tools. 

For an introduction to ACT Rules, see Accessibility Conformance Testing (ACT) Overview.