Who administers direct democracy mechanisms at the national level?

Law on National Referendums, Legislative Initiativesand European Citizens’ Initiative (lastamended in 2012)

http://web.cvk.lv/pub/public/28862.html

Article 3

(1) Pursuant to the procedure prescribed by law,national referendums shall be prepared and supervised by the Central ElectionCommission, which shall issue the necessary instructions.

(As amended by the 8 November 2012 Law.)