3GPP 24.501 v20.0.0 — the document's own text

8.3.7.4 Maximum number of supported packet filters

Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).

This IE shall be included in the message for a PDN connection established when in S1 mode, after an inter-system change from S1 mode to N1 mode, if the UE is a UE operating in single-registration mode in a network supporting N26 interface, the UE has not previously successfully performed the UE-requested PDU session modification to provide this capability, the PDU session type is "IPv4", "IPv6", "IPv4v6" or "Ethernet", and the UE can support more than 16 packet filters for this PDU session.