History of Sudan
The modern Republic of Sudan was formed in 1956 and inherited its boundaries from Anglo-Egyptian Sudan, established in 1899. For times predating 1899, usage of the term "Sudan" for the territory of the Republic of Sudan was somewhat anachronistic, and may have referred to the more diffuse concept of the Sudan.
Constitution of Sudan
The first permanent Constitution of Sudan was drafted in 1973. It incorporated the Addis Ababa Agreement (1972) ending the first Sudanese civil war.
On 1 July 1998, a new constitution entered into force
after being approved in the constitutional referendum.
The current "Interim National Constitution of the Republic of Sudan, 2005" (INC) was adopted on 6 July 2005.