There are no international standards regarding visa policies because international law does not confer the right to enter a country, other than one’s own. For this reason, each State should have a solid visa policy that sets out which nations’ citizens require (or are exempt from) visas, the types of visa required (for example, tourism or employment), the type of passport (for example, ordinary or diplomatic), and the duration of the visa. A visa is usually processed prior to travel and, in itself, does not guarantee entry into a country. It is usually processed following an application made to an overseas mission (embassy, high commission, consulate, trade mission) of the receiving country.
States may choose to waive visa requirements from nationals of certain countries for a variety of reasons, including the following:
- Some States may choose to establish universality and harmonize visa requirements with other States. This does not imply that anyone can move freely across borders, take up employment, live and reside. The idea behind harmonization is to loosen the stringent requirements on travel between two countries and/or within a region, mainly by removing the need for a visa for short visits (usually 1–3 months and up to 6 months for certain areas), but still requiring a work permit for intended residency or other longer stays.
- Visas may be subject to reciprocity arrangements. When a foreign government waives visa requirements for citizens of a certain country, that same country might reciprocate and consider doing the same. Visa reciprocity is a central principle of the European Union’s common policy. This principle means that the European Union, when determining whether citizens of non-European countries can travel to the Schengen area without a visa, takes into consideration which third countries also grant a visa waiver to citizens of all European Union Member States.
- Visas are frequently put into place pragmatically, based on a specific set of issues and related data such as diplomatic relations, historical precedent, tourism/trade interests or security-related risks, as well as the stock and flow of regular or irregular migration from certain countries of origin.