GLOBAL CONNECTIONS: the Near/Middle East
December 24, 1951: Libya declares its independence under King Idris.

Libya gains independence on December 24, 1951. Setting the stage for independence was a 1949 United Nations resolution stating that Libya should become independent before January 1, 1952. The first country to gain independence through a UN resolution, Libya had been an Italian colony from the early 1900s through World War II and was then under French and British control in the postwar period (1945-1951).

WWW The United Nations and Libya
http://memory.loc.gov/frd/cs/lytoc.html#ly0035

This country study includes a section on Libya's involvement with the United Nations, including information on its path to independence.