Соответствующая норма
Nigeria
Practice Relating to Rule 161. International Cooperation in Criminal Proceedings
Nigeria’s Extradition Act (1967) states:
3. Restrictions on surrender of fugitives
(2) A fugitive criminal shall not be surrendered if it appears to the Attorney-General or a court dealing with the case-
(a) that the request for his surrender, although purporting to be made in respect of an extradition crime, was in fact made for the purpose of prosecuting or punishing him on account of his race, religion, nationality or political opinions or was otherwise not made in good faith or in the interest of justice; or
(b) that, if surrendered, he is likely to be prejudiced at his trial, or to be punished, detained or restricted in his personal liberty, by reason of his race, religion, nationality or political opinions,
(3) A fugitive criminal shall not be surrendered if the Attorney-General or a court dealing with the case is satisfied that, by reason of-
(a) the trivial nature of the offence for which his surrender is sought; or
(b) the passage of time since the commission of the offence,
it would, having regard to all the circumstances in which the offence was committed, be unjust or oppressive, or be too severe a punishment, to surrender the offender.
(4) A fugitive criminal shall not be surrendered if the Attorney-General or a court dealing with the case is satisfied that, whether in Nigeria or elsewhere, he-
(a) has been convicted [of the] offence for which his surrender is sought; or
(b) has been acquitted thereof, and that, in a case falling within paragraph (a) of this subsection, he is not unlawfully at large.
(5) A fugitive criminal shall not be surrendered if criminal proceedings are pending against him in Nigeria for the offence for which his surrender is sought.
(6) A fugitive criminal-
(a) who has been charged with an offence under the law of Nigeria or any part thereof, not being the offence for which his surrender is sought; or
(b) who is serving a sentence imposed in respect of any such offence by a court in Nigeria, shall not be surrendered until such time as he has been discharged whether by acquittal or on the expiration of his sentence, or otherwise.
4. Offences under military law
(1) A fugitive criminal may be surrendered notwithstanding that the Attorney-General or a court dealing with the case is satisfied that the offence constitutes an offence only under military law or law relating only to military obligations.
5. Liability of fugitives to surrender
Every fugitive criminal of a country to which this Act applies shall, subject to the provisions of this Act, be liable to be arrested and surrendered in the manner provided by this Act, whether the offence in respect of which his surrender is sought was committed before or after the commencement of this Act or the application of this Act to that country, and whether or not there is concurrent jurisdiction in any court in Nigeria over that offence.
6. Requests for surrender, and powers of Attorney-General thereon.
(1) A request for the surrender of a fugitive criminal of any country shall be made in writing to the Attorney-General by a diplomatic representative or consular officer of that country and shall be accompanied by a duly authenticated warrant of arrest or certificate of conviction issued in that country. 
Nigeria, Extradition Act, 1967, Articles 3(2)–(6), 4(1), 5 and 6(1).
Nigeria’s Extradition Law (1967) states:
6. Requests for surrender, and powers of Attorney-General thereon
(3) Except in so far as an extradition agreement in force between Nigeria and the requesting country otherwise provides, the Attorney-General may refuse to make an order under this section in respect of any fugitive criminal who is a citizen of Nigeria. 
Nigeria, Extradition Act, 1967, Article 6(3).
Nigeria’s Extradition Act (1967) states that a “fugitive criminal shall not be surrendered if the Attorney-General or a court dealing with the case is satisfied that the offence in respect of which his surrender is sought is an offence of a political character”. 
Nigeria, Extradition Act, 1967, Article 3(1).