GROPPERA RADIO AG AND OTHERS v. SWITZERLAND JUDGMENT 6 communicated directly or indirectly with each other by telephone or over the air. Like Radio 24, Sound Radio broadcast only in the Zürich dialect. 16. Swiss local radio stations began broadcasting from 1 November 1983 and attracted a large number of listeners. They came into competition with Sound Radio, mainly because they could finance themselves through advertising, subject to certain conditions. An opinion poll carried out in the Zürich area and published on 1 December 1983 showed that Radio 24 reached 60% of listeners and Sound Radio 12%. B. The proceedings in Switzerland 17. On 17 August 1983 the Federal Council issued an Ordinance relating to the Act governing correspondence by telegraph and telephone ("the 1983 Ordinance") to replace another of 10 December 1973. It came into force on 1 January 1984 and contained general provisions applicable to the licensing scheme. It created a third category of licence for receiving installations community-antenna installations - which was additional to categories 1 (private receiving) and 2 (public receiving). By Article 78 § 1 (a) of the Ordinance, "A community-antenna licence shall entitle the holder to: (a) operate the local distribution network defined in the licence and rebroadcast by this means radio and television programmes from transmitters which comply with the provisions of the International Telecommunication Convention of 25 October 1973 and the international Radio Regulations and with those of the international conventions and agreements concluded within the International Telecommunication Union; ..." 18. From 1 January 1984 most of the Swiss cable companies ceased to retransmit the programmes put out by Sound Radio. Some of them, however, including the community-antenna co-operative of Maur and the surrounding district (Genossenschaft Gemeinschaftsantennenanlage Maur und Umgebung - "the co-operative"), continued to broadcast them. 1. The administrative proceedings 19. On 21 March 1984 the Zürich area telecommunications office of the national Post and Telecommunications Authority (PTT) informed the cooperative that Groppera Radio AG’s broadcasts, since they did not comply with the international rules in force, were unlawful, so that under Article 78 §§ 1 and 3 of the 1983 Ordinance retransmission was not covered by the community-antenna licence. It added that the co-operative would be