Legal provisions for optional referendums at national level

Morocco
Morocco’sConstitution of 2011
https://www.constituteproject.org/constitution/Morocco_2011.pdf
Article 2: Sovereignty belongs to theNation which exercises it directly, by way [voie] of
referendum, and indirectly, by the intermediary of itsrepresentatives.
Article132:
The Constitutional Court exercises theattributions which are devolved on it by the
Articles of the Constitution and theprovisions of the organic laws. It decides,
moreover, on the regularity of the electionof the members of Parliament and of the
operations of referendum.
Article172:
The initiative of the revision of theConstitution belongs to the King, to the Head of
Government, and to the Chamber ofRepresentatives and to the Chamber of
Councilors.
The King can submit directly to referendumthe bill of revision of which He takes the
Initiative.