Information to be provided about programming 18 A subscription broadcasting service licensee must provide clear and consistent information to its audience about the classification thereof, so that its audience may select the programming – 18.1 they do not wish to view or listen to; 18.2 they do not wish their children to view or listen to. 19. A subscription broadcasting service licensee must therefore clearly and consistently indicate in relation to all its programming, other than programming which it would classify as "family viewing" - 19.1 the classification thereof in its hard copy programme guide and its EPG; and 19.2 the classification thereof in any material advertising or promoting programming to be broadcast. 20. If a programme to be broadcast is classified as anything other than "family viewing", a subscription broadcasting service licensee, wherever practicable, must clearly indicate, immediately prior to the commencement of that programme, the classification thereof. Parental Control Mechanism 21. A subscription broadcasting licensee must, wherever practicable, implement adequate mechanisms to enable a subscriber, using a reasonably secure mechanism, such as a PIN number selected by the subscriber, to block a programme, based on the classification of the programme, or a channel, included in its service. 22. In order to enable a subscriber to block a programme, based on the classification of the programme, a subscription broadcasting service licensee must, wherever practicable – 22.1 capture the programming classification information electronically ("the classification data"); and 22.2 add the classification data to the output signal of the subscription broadcasting service in the transmission broadcast stream received by a subscriber's decoder so that the subscriber's decoder receives a message that the programme being received has a particular classification. 23. A subscription broadcasting service licensee must ensure that any decoders which it promotes or sells are capable of allowing a subscriber to