Section 28: Documents under classification, Cap. 03, LFN, 1990.

(1) The fact that any information in the custody of a public institution is kept by that institution under security classification or is classified document within the meaning of the Official Secrets Act does not preclude it from being disclosed pursuant to an application for disclosure thereof under the provisions of this Act, but in every case the public institution to which the application is made shall decide whether such information is of a type referred to in sections 11, 12, 14, 15, 16, 17, 19,20 or 21 of this Act.
(2) If the public institution to which the application in sub-section (1) is made, decides that such information is not a type mentioned in the sections referred to in sub-section (1), access to such information shall be given to the applicant.
(3) If the public institution, to which the application mentioned in subsection (1) is made, decides that such information is of a type mentioned in sections referred to in sub-section (1), it shall give notice to the applicant.