punishing a person on account of that person’s sex, race, religion, nationality, ethnic origin or political opinions or that compliance with the request would cause prejudice to that person’s position for any one of these reasons. 15. States Parties may not refuse a request for extradition on the sole ground that the offence is also considered to involve fiscal matters. 16. Before refusing extradition, the requested State Party shall, where appropriate, consult with the requesting State Party to provide it with ample opportunity to present its opinions and to provide information relevant to its allegation. 17. States Parties shall seek to conclude bilateral and multilateral agreements or arrangements to carry out or to enhance the effectiveness of extradition. Article 17. Transfer of sentenced persons States Parties may consider entering into bilateral or multilateral agreements or arrangements on the transfer to their territory of persons sentenced to imprisonment or other forms of deprivation of liberty for offences covered by this Convention, in order that they may complete their sentences there. Article 18. Mutual legal assistance 1. States Parties shall afford one another the widest measure of mutual legal assistance in investigations, prosecutions and judicial proceedings in relation to the offences covered by this Convention as provided for in article 3 and shall reciprocally extend to one another similar assistance where the requesting State Party has reasonable grounds to suspect that the offence referred to in article 3, paragraph 1 (a) or (b), is transnational in nature, including that victims, witnesses, proceeds, instrumentalities or evidence of such offences are located in the requested State Party and that the offence involves an organized criminal group. 2. Mutual legal assistance shall be afforded to the fullest extent possible under relevant laws, treaties, agreements and arrangements of the requested State Party with respect to investigations, prosecutions and judicial proceedings in relation to the offences for which a legal person may be held liable in accordance with article 10 of this Convention in the requesting State Party. 3. Mutual legal assistance to be afforded in accordance with this article may be requested for any of the following purposes: 19