3GPP 23.501 v20.2.0 — the document's own text
5.7.1.9 Precedence Value
Taught in 14. What the network promises (The 5G system architecture, in depth), 5. The connection, and what is promised on it (The 5G system architecture, overview).
The QoS rule precedence value and the PDR precedence value determine the order in which a QoS rule or a PDR, respectively, shall be evaluated. The evaluation of the QoS rules or PDRs is performed in increasing order of their precedence value.