Penal Code, banning incitement of hatred and violence on grounds of ethnicity, class or religion (with penalties of up to 3 years), is also used against journalists and media workers. Article 314 of the Penal Code is often invoked against journalists, particularly Kurds and leftists, due to its broad definition of terrorism and of membership in an armed organisation. It carries a minimum sentence of 7,5 years. According to the OSCE, most of 22 jailed journalists as of June 2014 had been charged or condemned based on Art. 314. Article 81 of the Political Parties Law (imposed by the military junta in 1982) forbids parties from using any language other than Turkish in their written material or at any formal or public meetings. This law is strictly enforced. Kurdish deputy Leyla Zana was jailed in 1994, ostensibly for membership to the PKK. In 1991, laws outlawing communist (Articles 141 and 142 of the criminal code) and Islamic fundamentalist ideas (Article 163 of the criminal code) were repealed. This package of legal changes substantially freed up expression of leftist thought, but simultaneously created a new offence of "separatist propaganda" under Article 8 of the Anti-Terror Law. Prosecutors also began to use Article 312 of the criminal code (on religious or racial hatred) in place of Article 163. The 1991 antiterrorism law (the Law on the Fight against Terrorism) has been invoked to charge and imprison journalists for activities that Human Rights Watch define as “nonviolent political association” and speech. The European Court of Human Rights has in multiple occasions found the law to amount to censorship and breach of freedom of expression. Constitutional amendments adopted in October 2001 removed mention of "language forbidden by law" from legal provisions concerning free expression. Thereafter, university students began a campaign for optional courses in Kurdish to be put on the university curriculum, triggering more than 1,000 detentions throughout Turkey during December and January 2002. Actions have also been taken against the Laz minority. According to the 1923 Treaty of Lausanne, Turkey only recognizes the language rights of the Jewish, Greek and Armenian minorities. The government ignores Article 39(4) of the Treaty of Lausanne, which states that: "[n]o restrictions shall be imposed on the free use by any Turkish national of any language in private intercourse, in commerce, religion, in the press or in publications of any kind or at public meetings." Pressured by the