Section 4: Deposit obligations.

(1) The publisher of every book published in Nigeria shall, within one month after the publication, deliver at his own expense to the National Library three copies of the book, two of which shall be kept in the National Library for permanent preservation and one of which shall be sent by the Director to the Ibadan University Library.
(2) The copies of the book delivered to the National Library under subsection (1) of this section-
(a) shall be perfect copies of the whole book, with all maps and illustrations belonging thereto, finished and coloured in the same manner as the best copies of the book are published; and
(b) shall be bound, sewed or stitched together and in the best paper on which the book is printed.
(3) Where any printed matter (other than matter of such descriptions as the Director may specify from time to time) is published by or on behalf of any department of Government of the Federation or of a State, it shall be the duty of the official in charge of the department to deliver forthwith to the Director for the purposes of the National Library-
(a) 25 copies of the publication, if it is published by or on behalf of a department of Government of the Federation; or
(b) ten copies of the publication, if it is published by or on behalf of a department of Government of a State,
or such smaller numbers of copies as the Director may determine in any particular case.
(4) If a publisher fails to comply with any provision of subsection (1) or (2) of this section, he shall be guilty of an offence and on conviction shall be liable to a fine not exceeding N100; and the court before which he is convicted may in addition order him to deliver to the Director three copies of the book in question or to pay to the Director the value of those copies.
(5) The President may, by order in the Federal Gazette, exclude any publisher or book, or any class of publisher or book, from the operation of subsections (1) and (2) of this section.
(6) The obligations imposed by this section are additional to any similar obligations which may be imposed by any law in force in a State other than this Act.
(7) In this section "book" includes-
(a) all literary works such as books, pamphlets, sheets of music, maps, charts, plans, tables and compilations;
(b) dramatic works;
(c) collective works such as encyclopaedias, dictionaries, year books or similar works, newspapers, magazines and similar periodicals;
(d) any work written in distinct parts by different authors or in which a part or parts of work of different authors is or are incorporated, and every part or division of such a work; and
(e) all forms in which documentary or oral records are published; "publisher", in relation to a book, means any person authorising or causing the book to be printed and distributed in Nigeria, excluding the Federal Government and the Governor of a State (or any person acting on its or his behalf), a public officer acting in his capacity as such and any person distributing in Nigeria a book published elsewhere.