However shortly after the legislation of "Civil Law" on 26 June 1927 (Mahalli Idareler Kanunu), the rights accorded to the Greek population of Imbros and Tenedos were revoked, in violation of the Lausanne Treaty. Thus, the island was demoted from an administrative district to a sub-district which resulted that the island was to be stripped of its local tribunals. Moreover, the members of the local council were obliged to have adequate knowledge of the Turkish language, which meant that the vast majority of the islanders were excluded. Furthermore, according to this law, the Turkish government retained the right to dissolve this council and in certain circumstances, to introduce police force and other officials consisted by non-islanders. This law also violated the educational rights of the local community and imposed an educational system similar to that followed by ordinary Turkish schools.