Legal provisions for mandatory referendums at national level

Yemen Constitution 2001. http://www.unhcr.org/refworld/category,LEGAL,,,YEM,3fc4c1e94,0.html

Article (101):a. The President of the Republic may not dissolve the House of Representatives except in urgent circumstances and only after a nationwide referendum. The Presidential decree to dissolve the House must offer an explanation for the reasons underpinning the dissolution and must call for a new parliamentary elections to be held within (60) days following the House dissolution.

Article (158):?The President of Republic and the House of Representatives shall have the right to request amendment of one or more than one article of the Constitution.The request must identify the article(s) that require amendment as well as the reasons and justification for such amendment. If the request is issued by the House of Representatives, it must be signed by one-third of its members. In all cases, the House shall discuss whether the motion for constitutional amendment is justifiable in principle or not. The motion shall be sustained if supported by the House absolute majority. If the motion is defeated, another request for constitutional amendments of the same article(s) may not be submitted until one year lapses following that motion defeat. If the motion for constitutional amendment(s) is sustained in principle, the House shall deliberate on the article(s) to be amended after a two-month period from the date of approval. If three quarters of the House support the motion for amendment of any article(s) stipulated in Chapter One and Two (i.e. Articles: 62, 63, 81, 82, 92,93, 98, 101, 105, 108, 110, 111, 112, 116, 119, 121, 128, 139, 146, 158, 159), that motion shall be presented to the people in a general referendum.?