order to implement Islam and achieve its objective by endeavouring to gain the leadership of the Islamic Ummah so that she could accept it as her leader, to implement Islam upon her and proceed with it in her struggle against the Kuffar ..." But according to a former leader in the UK, Jalaluddin Patel, once the caliphate has been established, HT "will never assume the role of a vanguard party". In countries where the party is outlawed, Hizb ut-Tahrir's organization is said to be strongly centralized, with its central leadership based in the Palestinian Territories. To avoid infiltration by security agents and maintain ideological coherence in a pyramid-like group, the party enforces internal discipline and obedience to the central leadership. The party "tolerates no internal dissent". A range of disciplinary measures are applied to members who break the rules, with expulsion being the most severe. The network of underground cells resembles that of the successful Bolshevik revolutionaries in Russia. At the top is the central committee (lajnat al-qiyada) of the international party, and the supreme leader (Amir). The main committee or agency is tasked with taking power to re-establish the caliphate by establishing contacts with "the centers of power such as the army and the political leaders". This agency is "the most secretive", and "reports directly" to the "Amir". Organizationally below its center are national organizations or wilayas (which actually means "province" since HT believes that nation states are un-Islamic; the only "nation" is the Islamic community), "usually headed by a group of 12, control networks of local committees and cells." Wilayas have an executive committee charged with managing administrative affairs which is elected every two years by the membership of the party in the wilaya. At the provincial level, there is a committee headed by a provincial representative (Mu’tamad) who oversees group activities. The Mu’tamad is appointed by the central committee. The basic unit of the party is a cell of five members, the leader of which is called a mushrif. The mushrif leads a study-circle and supervises its members' study of the HT ideology, listening to readings from books by the party's founder, Nabhani, particularly Nidham al-Islam, or the System of Islam, which "lays out Nabhani's vision of an 'Islamic' state" and "refutes" other Arab political ideologies. Where the party is not legal, only the mushrif knows the names of members of other cells. A candidate for membership