 Prior to gaining separate representation, areas now under the jurisdiction of Iligan were represented under the Department of Mindanao and Sulu (1917–1935), the historical Lanao Province (1935–1961), Region XII (1978–1984) and Lanao del Norte (1961–1972; 1987–2010).By virtue of being classified as a highly urbanized city in 1983, Iligan was granted separate representation for the first time in the Regular Batasang Pambansa, electing one representative, at large, in 1984.However, under the new Constitution which was proclaimed on February 11, 1987, the city was grouped again with Lanao del Norte and placed in its first congressional district; this district elected its first representative to the restored House of Representatives starting that same year.