# Rule X not allowed outside an “@scope” rule in a “style” element in “body”.
> Canonical HTML version: https://rocketvalidator.com/html-validation/rule-x-not-allowed-outside-an-scope-rule-in-a-style-element-in-body
> Attribution: Rocket Validator (https://rocketvalidator.com)
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)
Older builds of the validator reported at-rules like `@keyframes` and `@font-face` outside an `@scope` block in a `
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