update frontmatter

_rules/audio-or-video-avoids-automatically-playing-audio-80f0bf.md

@@ -31,9 +31,11 @@ accessibility_requirements:
     failed: not satisfied
     passed: further testing needed
     inapplicable: further testing needed
-input_rules:
-  - 4c31df
-  - aaa1bf
+input_aspects:
+   - DOM Tree
+   - CSS Styling
+   - Audio output
+   - Visual output
 acknowledgments:
   authors:
     - Anne Thyme Nørregaard
@@ -67,6 +69,8 @@ This rule assumes that the [mechanism](https://www.w3.org/TR/WCAG21/#dfn-mechani
 
 This rule assumes that the [mechanism](https://www.w3.org/TR/WCAG21/#dfn-mechanism) to control the sound must be visible and accessible in order to be effective and usable by all kinds of users. If the mechanism is hidden to some users, it is possible to fail this rule but still satisfy [Success Criterion 1.4.2 Audio Control][sc142].
 
+No [user style sheets](https://drafts.csswg.org/css-cascade/#cascade-origin-user) are used and no changes to the [user agent default style sheet](https://drafts.csswg.org/css-cascade/#cascade-origin-ua) are in place, otherwise the test cases might have different outcomes of the ones presented here. 
+
 ## Accessibility Support
 
 The native `video` and `audio` controls in several browser and assistive technology combinations are not keyboard accessible and the `video` or `audio` element itself may not be announced. Authors are recommended to use custom controls for keyboard navigation and cross browser accessibility support in general.