Ratified in the context of "Vienna Convention on Diplomatic Relations"

The Treaty of Tordesillas, signed in Tordesillas, Spain, on 7 June 1494, and ratified in Setúbal, Portugal, divided the newly discovered lands outside Europe between the Kingdom of Portugal and the Crown of Castile, along a meridian 370 leagues or 2,100 kilometres (1,300 mi) west of the Cape Verde islands, off the west coast of Africa. That line of demarcation was about halfway between Cape Verde (already Portuguese) and the islands visited by Christopher Columbus on his first voyage (claimed for Castile and León), named in the treaty as Cipangu and Antillia (Cuba and Hispaniola).

The lands to the east would belong to Portugal and the lands to the west to Castile, modifying an earlier bull by Pope Alexander VI. The treaty was created on 7 June 1494, then ratified by Spain on 2 July 1494, by Portugal on 5 September 1494, and by Pope Julius II on 24 January 1506. The other side of the world was divided a few decades later by the Treaty of Zaragoza, signed on 22 April 1529, which specified the antimeridian to the line of demarcation specified in the Treaty of Tordesillas. Portugal and Spain largely respected the treaties, while the Indigenous peoples of the Americas did not acknowledge them.

The Prohibition era was the period from 1920 to 1933 when the United States prohibited the production, importation, transportation, and sale of alcoholic beverages. The alcohol industry was curtailed by a succession of state legislatures, and Prohibition was formally introduced nationwide under the Eighteenth Amendment to the United States Constitution, ratified on January 16, 1919. Prohibition ended with the ratification of the Twenty-first Amendment, which repealed the Eighteenth Amendment on December 5, 1933.

A wide coalition of mostly Protestants, prohibitionists first attempted to end the trade in alcoholic drinks during the 19th century. They aimed to heal what they saw as an ill society beset by alcohol-related problems such as alcoholism, domestic violence, and saloon-based political corruption. Many communities introduced alcohol bans in the late 19th and early 20th centuries, and enforcement of these new prohibition laws became a topic of debate. Prohibition supporters, called "drys", presented it as a battle for public morals and health. The movement was taken up by progressives in the Prohibition, Democratic, and Republican parties, and gained a national grassroots base through the Woman's Christian Temperance Union. After 1900, it was coordinated by the Anti-Saloon League. Opposition from the beer industry mobilized "wet" supporters from the wealthy Catholic and German Lutheran communities, but the influence of these groups receded from 1917 following the entry of the U.S. into the First World War against Germany.

The Constitution of Yemen was ratified by popular referendum on 16 May 1991. It defines the republic as an independent and sovereign Arab and Islamic country and establishes sharia, or Islamic law, as the basis of all laws. In February 2001, several amendments were passed by national referendum extending the presidential term to seven years and the parliamentary term to six years and increasing the size and authority of the Shura Council.

Due to the 2011–2012 Yemeni revolution, President Abd Rabbuh Mansur Al-Hadi was expected to draft a new constitution from 2012 to 2014. In January 2015, a committee had drafted a new constitution; however, both the GPC and Houthi members of the National Authority for Monitoring the Implementation of NDC Outcomes have refused to vote on this draft. This will most likely delay a planned referendum on the new constitution, and therefore the next presidential and parliamentary elections, which have been delayed until the referendum can go ahead.

The Treaty of Edinburgh–Northampton was a peace treaty signed in 1328 between the Kingdoms of England and Scotland. It brought an end to the First War of Scottish Independence, which had begun with the English invasion of Scotland in 1296. The treaty was signed in Edinburgh by Robert the Bruce, King of Scots, on 17 March 1328, and was ratified by the Parliament of England meeting in Northampton on 1 May.

The terms of the treaty stipulated that in exchange for £20,000 sterling, the English Crown would recognise:

Disfranchisement after the Reconstruction era in the United States, especially in the Southern United States, was based on a series of laws, new constitutions, and practices in the South that were deliberately used to prevent black citizens from registering to vote and voting. These measures were enacted by the former Confederate states following the end of the Reconstruction era in the late 19th century. Efforts were also made in Maryland, Kentucky, and Oklahoma. Their actions were designed to thwart the objective of the Fifteenth Amendment to the United States Constitution, ratified in 1870, which prohibited states from depriving voters of their voting rights based on race. The laws were frequently written in ways to be ostensibly non-racial on paper (and thus not violate the Fifteenth Amendment), but were implemented in ways that selectively suppressed black voters apart from other voters.

In the 1870s, white racists had used violence by domestic terrorism groups (such as the Ku Klux Klan), as well as fraud, to suppress black voters. After regaining control of the state legislatures, Southern Democrats were alarmed by a late 19th-century alliance between Republicans and Populists that cost them some elections. After achieving control of state legislatures, white conservatives added to previous efforts and achieved widespread disfranchisement by law: from 1890 to 1908, Southern state legislatures passed new constitutions, constitutional amendments, and laws that made voter registration and voting more difficult, especially when administered by white staff in a discriminatory way. They succeeded in disenfranchising most of the black citizens, as well as many Poor Whites in the South, and voter rolls dropped dramatically in each state. The Republican Party was nearly eliminated in the region for decades, and the Southern Democrats established one-party control throughout the Southern United States.