Il Constitution. The position of Chairman of the National Defense Commission was replaced with the First Chairman of the National Defense Commission. 2013 amendment The Socialist Constitution was amended for the sixth time at the 7th session of the 12th Supreme People's Assembly on 1 April 2013. The preamble was revised to include the Kumsusan Palace of the Sun, which has been designated as a monument to the immortality of Kim Il-sung and Kim Jong-il and a national symbol for Korea. Compulsory education was revised from 10 years to 12 years following the approval of the law on extending North Korea's compulsory education at the 6th session of the 12th Supreme People's Assembly on 25 September 2012. 2016 amendment The Socialist Constitution was amended for the seventh time at the 4th session of the 13th Supreme People's Assembly on 29 June 2016. The preamble was revised to enshrine Kim Il-sung and Kim Jong-il as the eternal leaders of Juche Korea. The First Chairman of the National Defense Commission was replaced with the President of the State Affairs Commission, while the National Defense Commission was replaced with the State Affairs Commission which is designated as the supreme policy-oriented leadership body of the Republic, with its duties now expanded to cover other matters of national concern, making it a defacto successor to the Central People's Committee. The Supreme Court was renamed as the Central Court, while the Supreme Public Prosecutors Office was renamed as the Central Public Prosecutors Office. 2019 amendments The Socialist Constitution was amended for the eighth and ninth times, respectively, at the 1st and 2nd plenary sessions of the 14th Supreme People's Assembly on 11 April and 29 August 2019. The President of the State Affairs Commission was designated as the head of state, cannot stand as a candidate for election as a deputy to the SPA, and is elected and relieved by a majority vote in its plenary sessions. The Chairman of the Standing Committee of the Supreme People's Assembly is still tasked to receive the credentials and letters of recall of foreign diplomatic representatives to the Republic, with the President of the SAC now having the responsibility to appoint and relieve these diplomats. The orders of the President of the SAC were made superior to the ordinances of the Supreme People's Assembly save for more important ordinances which the President may now enact, alongside the decrees and