Question: Which of the following scenarios is NOT subject to the standard definition and operations of Policy and Charging Control (PCC) rules as defined in the telecom standards?
Option 1: Video Streaming over LTE
Option 2: PS to CS Session Continuity for Voice Services
Option 3: Data Roaming between 4G and 5G Networks
Option 4: QoS Management for IoT Devices
Explanation: The correct answer is Option 2 because, according to the provided context, "PS to CS session continuity" is explicitly exempted from the standard definition and operations of PCC rules. This exemption implies that the typical PCC rule definitions and operations do not apply in scenarios where there's a handover or continuity from Packet Switching (PS) to Circuit Switching (CS), often relevant for voice services ensuring uninterrupted calls when switching between network types.