Section 18: Entry Requirement.

(1) An immigration officer shall, unless the Minister or the Comptroller-General of Immigration otherwise directs, admit into Nigeria a person who-
(a) has in his possession a valid passport or such other travel document as is approved by the Minister or Comptroller-General of lmmigration for admission into Nigeria ;
(b) is in possession of a valid visa, residence or work permit, or any other permit, or other form of approval ;
(c)
is not a prohibited immigrant;
(d)
is not considered to be a risk to public health, public interest or national security; and
(e) should not be admitted into Nigeria on any other ground that may be prescribed from time to time by the Minister or the Comptroller-General of Immigration.
(2) A resident or work permit granted to a foreign immigrant shall be treated for purposes of entry into Nigeria as a multiple entry permit.