This policy setting prevents the Accessibility Checker from checking to ensure that documents using styles have used them ...

This policy setting prevents the Accessibility Checker from checking to ensure that documents using styles have used them frequently enough to accurately represent the document's content structure.

If you enable this policy setting, the Accessibility Checker will be prevented from checking to ensure that documents using styles have used them frequently enough to accurately represent the document's content structure.

If you disable or do not configure this policy setting, the frequency of style usage will be checked and any issues will appear in the Accessibility Checker.