Article 17. Agreements and arrangements States Parties shall consider the conclusion of bilateral or regional agreements or operational arrangements or understandings aimed at: (a) Establishing the most appropriate and effective measures to prevent and combat the conduct set forth in article 6 of this Protocol; or (b) Enhancing the provisions of this Protocol among themselves. Article 18. Return of smuggled migrants 1. Each State Party agrees to facilitate and accept, without undue or unreasonable delay, the return of a person who has been the object of conduct set forth in article 6 of this Protocol and who is its national or who has the right of permanent residence in its territory at the time of return. 2. Each State Party shall consider the possibility of facilitating and accepting the return of a person who has been the object of conduct set forth in article 6 of this Protocol and who had the right of permanent residence in its territory at the time of entry into the receiving State in accordance with its domestic law. 3. At the request of the receiving State Party, a requested State Party shall, without undue or unreasonable delay, verify whether a person who has been the object of conduct set forth in article 6 of this Protocol is its national or has the right of permanent residence in its territory. 4. In order to facilitate the return of a person who has been the object of conduct set forth in article 6 of this Protocol and is without proper documentation, the State Party of which that person is a national or in which he or she has the right of permanent residence shall agree to issue, at the request of the receiving State Party, such travel documents or other authorization as may be necessary to enable the person to travel to and re-enter its territory. 5. Each State Party involved with the return of a person who has been the object of conduct set forth in article 6 of this Protocol shall take all appropriate measures to carry out the return in an orderly manner and with due regard for the safety and dignity of the person. 6. States Parties may cooperate with relevant international organizations in the implementation of this article. 7. This article shall be without prejudice to any right afforded to persons who have been the object of conduct set forth in article 6 of this Protocol by any domestic law of the receiving State Party. 63