Who can initiate an optional referendum at the national level?

Constitution of Colombia 1991 (rev. 2015)

Articles 104, 170 and 374;

Law 134 on Political Participation (Official Gazette 41.373 of May 31, 1994)

Articles 7, 28, 32 and 64.

President, with the signature of all members of his/her cabinet and the previous acceptance of the Senate, can initiate areferendum on issues of national relevance. The Legislature can only initiate a referendum in the case of setting up a National Constitutional Assembly. Support of at least 10% of the registered voters is required to initiate abrogative or rejective referendum.