The 13 states are based on historical Malay kingdoms, and 9 of the 11 Peninsular states, known as the Malay states, retain their royal families. The King is elected by and from the nine rulers to serve a five-year term.This King appoints governors serving a four-year term for the states without monarchies, after consultations with the chief minister of that state. Each state has a unicameral legislature known as the State Legislative Assembly, and its own written constitution. Sabah and Sarawak have considerably more autonomy than the other states, most notably having separate immigration policies and controls, and a unique residency status. In recent situation, there have been some unwarranted calls for separation from several states such as Johor, Kelantan, Sabah and Sarawak due to certain issues such as federal government intervention on states affairs, lack of developments and dispute on share of oil royalties.