Twenty-second Amendment to the United States Constitution
The Twenty-second Amendment (Amendment XXII) to the United States Constitution sets a limit on the number of times an individual is eligible for election to the office of President of the United States, and also sets additional eligibility conditions for presidents who succeed to the unexpired terms of their predecessors.
Constitution of Singapore
Article 5A was introduced to deal with non-core constitutional amendments. The Article enables the President to veto proposed constitutional amendments that directly or indirectly circumvent or curtail the discretionary powers conferred on him by the Constitution. However, the power to veto is not absolute as the President may, acting on the Cabinet's advice, refer the matter to a constitutional tribunal under Article 100 for its opinion on whether a proposed amendment indeed has this effect. If the tribunal's view is different from the President's, the President is deemed to have assented to the bill on the day immediately following the day when the Tribunal pronounces its opinion in open court. However, if the tribunal upholds the President's view, the Prime Minister may refer the bill to a national referendum. The President's veto is overruled if not less than two-thirds of the total number of votes cast approve the proposed amendment. The President is deemed to have assented to the amendment on the day immediately following the day when the results of the referendum have been published in the "Government Gazette". This scheme prevents a gridlock that may arise if the Government calls for a new election to circumvent the President's veto. Thus, Article 5A provides a series of legal checks and balances between the President on the one hand, and the Prime Minister and Cabinet on the other. It increases the Constitution's rigidity as the power to amend the Constitution is no longer vested solely in Parliament.