Party, and Commander in Chief of the Cuban armed forces. The Ministry of Interior is the principal organ of state security and control. According to the Constitution of Cuba, Article 94, the First Vice President of the Council of State assumes presidential duties upon the illness or death of the President. On July 31, 2006, during the 2006 Cuban transfer of duties, Fidel Castro delegated his duties as President of the Council of state, first secretary of the Cuban Communist Party and the post of commander in chief of the armed forces to first Vice President Raúl Castro. Since 2019, the President of Cuba is also limited to two five year terms. Legislature Cuba has an elected national legislature, the National Assembly of People's Power (Asamblea Nacional del Poder Popular), which has 612 members, elected every 5 years and holds brief sessions to ratify decisions by the executive branch. The National Assembly convenes twice a year in ordinary periods of sessions. However, it has permanent commissions to look after issues of legislative interest. Among its permanent or temporary commissions are those in charge of issues concerning the economy, sugar industry, industries, transportation and communications, constructions, foreign affairs, public health, defense and interior order. The National Assembly also has permanent departments that oversee the work of the Commissions, Local Assemblies of the People's Power, International Relations, Judicial Affairs and the Administration. Article 88(h) of the Constitution of Cuba, adopted in 1976, provides for citizen proposals of law, prerequisite that the proposal be made by at least 10,000 citizens who are eligible to vote. In 2002 supporters of a movement known as the Varela Project submitted a citizen proposal of law with 11,000 signatures calling for a national referendum on political and economic reforms. The Government response was to collect 8.1 million signatures to request that Cuba's National Assembly enact a constitutional amendment making socialism an unalterable feature of Cuban government. Committees for the Defense of the Revolution The Committees for the Defense of the Revolution is a network of neighborhood organizations across Cuba of which most Cubans are members. The organizations are designed to put medical, educational or other campaigns into national effect, and to report "counter-revolutionary" activity. It is the duty of the CDR officials to know the political activities of each person in their respective blocks. Political parties and elections Suffrage is non-compulsory and is afforded to Cuban citizens