Border control comprises measures taken by governments to monitor and regulate the movement of people, animals, and goods across land, air, and maritime borders. While border control is typically associated with international borders, it also encompasses controls imposed on internal borders within a single state.
A visa is a conditional authorization granted by a polity to a foreigner that allows them to enter, remain within, or leave its territory. Visas typically include limits on the duration of the foreigner's stay, areas within the country they may enter, the dates they may enter, the number of permitted visits, or if the individual can work in the country in question. Visas are associated with the request for permission to enter a territory and thus are, in most countries, distinct from actual formal permission for an alien to enter and remain in the country. In each instance, a visa is subject to entry permission by an immigration official at the time of actual entry and can be revoked at any time. Visa evidence most commonly takes the form of a sticker endorsed in the applicant's passport or other travel document but may also exist electronically. Some countries no longer issue physical visa evidence, instead recording details only in immigration databases.
The National Registration Identity Card (NRIC), colloquially known as "IC", is a compulsory identity document issued to citizens and permanent residents of Singapore. People must register for an NRIC within one year of attaining the age of 15, or upon becoming a citizen or permanent resident. Re-registrations are required for persons attaining the ages of 30 and 55, unless the person has been issued with an NRIC within ten years prior to the re-registration ages.
The visa policy of Australia deals with the requirements that a foreign national wishing to enter Australia must meet to obtain a visa, which is a permit to travel, to enter and remain in the country. A visa may also entitle the visa holder to other privileges, such as a right to work, study, etc. and may be subject to conditions.
The Singapore passport is a passport issued to citizens of the Republic of Singapore. It enables the bearer to exit and re-enter Singapore freely; travel to and from other countries in accordance with visa requirements; facilitates the process of securing assistance from Singapore consular officials abroad, if necessary; and requests protection for the bearer while abroad.
The Immigration and Checkpoints Authority (ICA) is a law enforcement agency within the Ministry of Home Affairs (MHA), the border control agency responsible for frontline border control operations at air, sea and rail ports in Singapore.
Global Entry is a program of the U.S. Customs and Border Protection service that allows pre-approved, low-risk travelers to receive expedited clearance upon arrival into the United States through automatic kiosks at select airports and via the SENTRI and NEXUS lanes by land and sea. As of May 4, 2018, Global Entry was available at 53 U.S. airports and 15 preclearance locations. By April 2018 more than five million people were enrolled in Global Entry and approximately 50,000 new applications for the program were being filed each month.
The Government of the Macau Special Administrative Region allows citizens of specific countries/territories to travel to Macau for tourism or business purposes for periods ranging from 14 to 180 days without having to obtain a visa. For other entry purposes, such as establishing residence on a long-term basis, a different policy applies.
The visa policy of Hong Kong deals with the requirements in which a foreign national wishing to enter Hong Kong through one of the 15 immigration control points must meet to obtain an entry permit or Visa, which depending on the traveller's nationality, may be required to travel to, enter, and remain in the Hong Kong Special Administrative Region. Visitors from over 145 countries are permitted without Visa entry for periods ranging from 7 to 180 days, to the Hong Kong Special Administrative Region for tourism or certain business-related activities. All visitors must hold a passport valid for more than 1 month.
The APEC Business Travel Card (ABTC) is a travel document issued to business travelers who are citizens of APEC participating economies. It is valid for five years. The card waives the need for a visa when visiting other APEC participating economies, provided the bearer has obtained the corresponding pre-clearance during the application process.
Visa requirements for Singapore citizens are administrative entry restrictions by the authorities of other states which are imposed on citizens of Singapore.
The Singaporean Certificate of Identity (COI) is an international travel document issued by the Immigration and Checkpoints Authority to Singapore Permanent Residents (SPR) who are stateless and holding a Singapore blue identity card. The Singapore Certificate of Identity is to help facilitate SPRs to travel abroad. The holder will require a visa whenever they wish to visit or pass through other countries.
The visa policy of Malaysia consists of the requirements for foreign nationals to travel to, enter, and remain in Malaysia. Most visitors to Malaysia are granted visa-free entry for a period of 90, 30, or 14 days respectively. However, nationals from some countries must first obtain a visa from one of the Malaysian diplomatic missions around the world before being allowed into the country.
Visitors to Thailand must obtain a visa from one of the Thai diplomatic missions unless they are citizens of one of the visa-exempt countries, or citizens who may obtain a visa on arrival, or citizens eligible for an e-Visa.
Most visitors to Cambodia must obtain a visa, either on arrival or online, unless they are citizens of one of the visa-exempt countries.
Visitors to Papua New Guinea must obtain a visa on arrival or an e-Visa to enter the country. Visitors may also apply for a visa from the PNG diplomatic missions.
Any foreign national who wishes to enter Myanmar must obtain a visa unless they are a citizen of one of the designated visa-exempt countries.
Visa requirements for crew members are administrative entry restrictions imposed by countries on members of a ship or aircraft crew during transit.
Automated border control systems (ABC) or eGates are automated self-service barriers which use data stored in a chip in biometric passports along with a photo or fingerprint taken at the time of entering the eGates to verify the passport holder's identity. Travellers undergo biometric verification using facial or iris recognition, fingerprints, or a combination of modalities. After the identification process is complete and the passport holder's identity is verified, a physical barrier such as a gate or turnstile opens to permit passage. If the passport holder's identification is not verified or if the system malfunctions, then the gate or turnstile does not open and an immigration officer will meet the person. E-gates came about in the early 2000s as an automated method of reading the then-newly ICAO mandated e-passports.
An electronic visa (E-Visa) and an electronic travel authorization are digital travel permits commonly required in conjunction with a valid passport for entry into specific jurisdictions. These electronic travel documents have gained prominence in the modern era of digital connectivity and streamlined travel processes.
Singaporeportal 
