3GPP 23.501 v20.2.0 — the document's own text

5.2.7 Lawful Interception

Taught in 7. Every name the system uses (The 5G system architecture, in depth), 18. Being served by somebody else's network (The 5G system architecture, in depth), 4. Knowing who you are and where you are (The 5G system architecture, overview).

For definition and functionality of Lawful Interception, please see TS 33.126 [35].