Legal provisions for mandatory referendums at national level

Moldova, Republic of
Constitutionof Moldova
http://aceproject.org/ero-en/regions/europe/MD/the-constitution-of-moldova-2000/at_download/file
Article142. Limits of revision
(1)The provisions regarding the sovereignty, independence and unity of the State,as well as those regarding the permanent neutrality of the State may be revisedonly by referendum based on a majority vote of the registered voting citizens.
(2)No revision shall be performed, if it implies the infringement of fundamentalrights and freedoms of citizens, or their guarantees.
(3)The Constitution may not be revised under a state of national emergency,martial law or war.
Article143. Law on the Constitutional Amendment
(1)Parliament shall be entitled to pass a law on the amendment of Constitutionfollowing at least 6 months from the date of the corresponding initiative launch. The lawshall be adopted by a vote of two-thirds of the Parliament members.
(2)If, within a year from the date when the initiative on the amendment ofConstitution was launched, the Parliament has not passed the appropriateconstitutional law, the proposal shall be deemed null and void.
ElectoralCode:
ElectoralCode of Moldova
http://vota.te.gob.mx/sites/default/files/national/37/moldovaelectoralcode_html_11710.html
Article142. Republican referendum
(1) The republican referendumshall develop for the purpose of exercising the people’s power and its directparticipation at the management and administration of the state affairs.
(2) The republicanreferendum shall be held by universal, equal, direct, secret and freely expressedsuffrage, in compliance with the Constitution and this Code’s provisions.
Article143. Typesof republican referendum
(1) Depending on thelegal aspect of the issue subjected to referendum, the republican referendumsmay be constitutional, legislative and advisory.
(2) To constitutionalreferendum issues regarding the revision of Constitution shall be subjected.
(3) To legislativereferendum draft-laws or some legal provisions of major importance shall besubjected.
(4) To advisoryreferendum issues of national importance, pursuing to ask the opinion of thepeople on such issues and further adoption, by competent public authorities, ofsome final decisions shall be subjected.