World Rugby Decision Framework for High Tackle
The guideline included is intended to improve consistency in application of sanctions by distinguishing between dangerous tackles that warrant a penalty, yellow card or red card. The framework also supports protection of the head of both players by consistently and frequently sanctioning the tackle behavior that is known to be the highest risk.

USA Rugby Technical Zone Resources
A complete overview and resources for USA Rugby Technical Zones & Sideline Management.

https://laws.worldrugby.org/index.php?domain=9&language=EN

Sideline Zones
https://assets.usarugby.org/docs/club/cms/USA-Rugby-Technical-Zone-and-Sideline-Management-Guidelines.pdf?v=1553129615175