Any amendment requires the approval of three-quarters of the states, plus a two-thirds majority in both houses of Congress.

ECONOMIST: Gay marriage

The European Union (Approval of Treaty Amendment Decision) Bill ratifies the creation of a new European bailout agreement between eurozone countries, from which the UK is exempt.

BBC: Alexander lambasts 'imperial delusion' of coalition

Among other prerogatives, the Conference of States Parties to the International Convention against Doping in Sport is also responsible for the review and approval of any amendment to the Convention.

UNESCO: All Events | United Nations Educational, Scientific and Cultural Organization

While the amendment appears unlikely to gain approval as congressional leaders try to keep the spending bill on track for final passage before March 27, when the current government spending provisions expire, it opens the door for debate.

WSJ: Saturday Postal Pullback in Limbo

Formally abolishing the Electoral College would involve a Constitutional Amendment, which would require the approval of three-fourths of the states.

FORBES: Dumb, Destructive Move

Approval of the bill seemed assured earlier in the day Thursday, when an amendment aimed at preserving the right of all detainees to challenge their imprisonment in federal courts was narrowly defeated.

NPR: Senate Votes to Approve Detainee Treatment Bill

Back in the 1970s the people supporting the mini-bottles-only rule got it embedded in the state constitution, any amendment to which requires a two-thirds vote by both houses of the state legislature, as well as approval by a majority of South Carolina's voters in a referendum.

ECONOMIST: Your health! (in small doses only)