Parliament of Singapore was allocated 15 out of 127 seats. Under its new State Constitution, Singapore kept its own executive government and legislative assembly. However, with effect from 9 August 1965, Singapore left Malaysia and became a fully independent republic. On separation from Malaysia, the Singapore Government retained its legislative powers, and the Parliament of Malaysia gave up all power to make laws for Singapore. Similarly, the Republic of Singapore Independence Act 1965, passed on 22 December 1965 and made retrospective to 9 August, declared that the legislative powers of the Yang di-Pertuan Agong (Supreme Head of the Federation) and Parliament of Malaysia
Federation in practice highly centralized under the government of the Soviet Union. The Russian Federation has inherited a similar system. Nigeria, Pakistan, India and Malaysia became federations on or shortly before becoming independent from the British Empire. In some recent cases, federations have been instituted as a measure to handle ethnic conflict within a state, such as Bosnia and Herzegovina, and Iraq since 2005. With the United States Constitution having become effective on 4 March 1789, the United States is the oldest surviving federation. On the other end of the timeline is Nepal, which became the newest federation after its constitution