Draft Decision of the Secretary of State for the Information Society and the Digital Agenda publishing the technical requirements for the following regulated radio interfaces:
IR-4 on analogue PMR446 equipment in the frequency band 446–446.2 MHz
IR-97 on digital PMR446 equipment in the frequency band 446-446.2 MHz
The interface document contains the requirements to be met by PMR446 equipment in the frequency bands specified in the interface in question, for proper use of the radio spectrum.