Who may propose the registration of an initiative?

Hungary's Constitution of 2011

https://www.constituteproject.org/constitution/Hungary_2011.pdf

National referenda

Article 8

1. Parliament shall order a national referendumupon the motion of at least two hundred thousand electors. Parliament may ordera national referendum upon the motion of the President of the Republic, theGovernment or one hundred thousand electors. The decision made by any valid andconclusive referendum shall be binding on Parliament.

National Election Office (website)

http://valasztas.hu/en/ovi/219/219_1.html

 I. The organizer ofthe initiative

The organizer of anational referendum initiative could only be a person who has suffrage at theparliamentary elections, a party or any other association. An association thatis not considered as a party can be the organizer of a referendum initiative incases only, if the question is dealing with those matters which fall within thearea of activity laid down in its instrument of constitution. An initiative canbe organized by more organizers, in this case a person – on behalf of the organizers– should be pointed out, and shall be entitled to keep contact with theelectoral bodies, thus with the National Election Office (NEO) and the NationalElection Commission (NEC).