Issues of sub-national referendums regulated at the national level

Constitution of Colombia 1991 (rev. 2015)

ARTICLE 307
The respective Institutional Act, subject to the prior plan of the Committee of Territorial Planning, shall establish the conditions to solicit the conversion of the region into a territorial entity. The decision taken by Congress shall be submitted in each case to a referendum by the citizens of the departments concerned.

The same law shall establish the powers, organs of administration, and resources of the regions and their participation in the handling of revenues originating from the National Endowment Fund. It shall also define the principles for the adoption of the special statute of each region.