What can be brought to a referendum?
South Sudan
Constitution (2011)http://www.sudantribune.com/IMG/pdf/The_Draft_Transitional_Constitution_of_the_ROSS2-2.pdf
193. (1) Pursuant to Schedule A(30) herein, the President, or the National Legislature, through a resolution passed by more than half of all its members, may refer for a referendum any matter of public interest.
197. This Constitution shall not be amended unless the proposed amendment is approved by two-thirds of all members of each House of the National Legislature sitting separately and only after introduction of the draft amendment at least one month prior to the deliberations.