The directive also introduces the electronic visa (e-visa) in addition to visas acquired through the prior application procedures (. B for example, in embassies, visa application centres or on arrival). E-visas can be obtained through an online application process and require prior authorization before arrival in Nigeria. The policy is an upward revision of the old 2012 visa policy. It introduces three visa categories and their respective visa codes, which means that the number of visas increases from six to 79, and visa-free countries are introduced. The following visa categories apply to countries that are not visa-free or exempt: STR for dependants, etc. These STR visa categories have specific operational requirements for issuing visas. This is a visa authorization that allows an immigrant to enter Nigeria in order to complete a specific task within a specified time frame. These tasks include, but not just the installation/repair of machines.
review of accounts, training or other specialized work for which Nigeria lacks expertise. TWPs are usually issued for a period of 3 months. All TWP cable visas must be approved by the Nigerian Immigration Service (CGIS) comptroller. Businesses and organizations wishing to use expat services for short contracts must apply to abuja General For visa/entry permits for a temporary work permit (TWP) for these expatriates. Temporary TWP-eligible allowances include: the tourist visa is made available to citizens of all countries, with the exception of ECOWAS nationals who do not need a visa to travel to Nigeria and other countries that have entered into agreements to abolish the visa requirement. This type of visa is usually issued to potential holidaymakers who wish to visit wealthy travel locations in the country. However, they should have defined the scope of their planned tour. The lifespan of this type of visa usually varies from 3 months.
For visitor visa, this type of visa is issued for visitors who have been invited either by friends or relatives in the country. Holders of a written electronic visa authorization issued by the headquarters of the Immigration Office in Abuja can obtain a visa upon arrival, provided they have a visa application form and an e-visa application letter and an invitation letter from the Nigerian company accepting immigration obligations.  Business visas are available to citizens of all countries, with the exception of ECOWAS nationals, who do not need a visa to travel to Nigeria and other countries that have agreements to abolish the visa requirement. This type of visa is issued to potential business travellers who come to Nigeria only to carry out short-term transactions. As a general rule, it is issued for a period of up to three months, depending on the conviction of the issuing official and compliance with the specified requirement. The transit visa is available to nationals of all countries, with the exception of ECOWAS, who do not need a visa to travel to Nigeria and other countries that have agreements to abolish the visa requirement. This type of visa is issued for travelers with destinations other than Nigeria, but of course to stop.