Original:  The Constitution of 25 February 1959 was created by and then ratified vote of the Constituent Assembly of Niger, a body created for this purpose from the elected Territorial Assembly of Niger  in December 1958.
Revised:  The Constitution of 25 February 1959 was created by and then ratified vote of the Constituent Assembly of Niger, a body created for this purpose from the Territorial Assembly of Niger in December 1958.
Edit intent: style