The Member States’ reports refer to various methods for the monitoring and control of compliance with the requirements of Articles 4 and 5. In most cases, the assessment of the data is the responsibility of the national or federal authority in charge of audiovisual matters. In the vast majority of Member States, the collection of data is left to the broadcasters, who submit their data to the responsible authorities. In a few cases, monitoring is carried out by private research companies, which then submit the data to the responsible authorities. Additional monitoring methods include monitoring of programmes, sampling — regular or random — as well as surveys. The form of monitoring and control may differ in some Member States according to the type of channel (public service or commercial) or the means of transmission (terrestrial or satellite). In this context, the Commission reiterates that the obligation under Article 4(3) of the Directive applies to all television programmes falling within the jurisdiction of the Member State concerned, irrespective of the type of channels or the means or modes of transmission (terrestrial, satellite, cable, broadband; analogue and/or digital).