2.1.1.4.4 License Update
License updates are accomplished by following the guidelines in section 2.2.1.4.3 and the message format guidance documented in section 2.2.1.4.3. License update messages are sent via TAG packets.
The transmitter initiates a license update for every event defined in [XMR] and for "License Generation", of the OpenCable Digital Unidirectional Receiver Interface Specification [OCDRIP].
Messages are repeated when transferring encrypted content to a receiver. Every TAG packet carries a license update message containing license derivation data.