passengers are in possession of the travel documents required for entry into the receiving State 4. Each State Party shall take the necessary measures, in ccordance with its domestic law, to provide for sanctions in cases of violation of the obligation set forth in paragraph 3 of this article 5. Each State Party shall consider taking measures that permit, in accordance with its domestic law, the denial of entry or revocation of visas of persons implicated in the commission of offences established in accordance with this protocol 6. Without prejudice to article 27 of the Convention, States Parties shall consider strengthening cooperation among border cont agencies by, inter alia, establishing and maintaining direct channels of communication Article 2 Security and control of documents Each State Party shall take such measures as may be necessary, within available means (a) To ensure that travel or identity documents issued by it are of such quality that they cannot easily be misused and cannot readily be falsified or unlawfully altered, replicated or issued; and (b) To ensure the integrity and security of travel or identity unlawful creation, Issuance and use of the State Party and to prevent their documents issued by or on behalf Article 13 Legitimacy and validity of documents At the request of another State Party, a State Party shall, in accordance with its domestic law, verify within a reasonable time the legitimacy and validity of travel or identity documents issued or purported to have been issued in its name and suspected of being used for purposes of conduct set forth in article 6 of this protocol Training and technical cooperation States Parties shall provide engthen specialized training for immigration and other relevant officials in preventing the conduct set forth in article 6 of this Protocol and in the humane treatment of migrants who have been the object of such conduct, while respecting their rights as set forth in this protocol– 8 – passengers are in possession of the travel documents required for entry into the receiving State. 4. Each State Party shall take the necessary measures, in accordance with its domestic law, to provide for sanctions in cases of violation of the obligation set forth in paragraph 3 of this article. 5. Each State Party shall consider taking measures that permit, in accordance with its domestic law, the denial of entry or revocation of visas of persons implicated in the commission of offences established in accordance with this Protocol. 6. Without prejudice to article 27 of the Convention, States Parties shall consider strengthening cooperation among border control agencies by, inter alia, establishing and maintaining direct channels of communication. Article 12 Security and control of documents Each State Party shall take such measures as may be necessary, within available means: (a) To ensure that travel or identity documents issued by it are of such quality that they cannot easily be misused and cannot readily be falsified or unlawfully altered, replicated or issued; and (b) To ensure the integrity and security of travel or identity documents issued by or on behalf of the State Party and to prevent their unlawful creation, issuance and use. Article 13 Legitimacy and validity of documents At the request of another State Party, a State Party shall, in accordance with its domestic law, verify within a reasonable time the legitimacy and validity of travel or identity documents issued or purported to have been issued in its name and suspected of being used for purposes of conduct set forth in article 6 of this Protocol. Article 14 Training and technical cooperation 1. States Parties shall provide or strengthen specialized training for immigration and other relevant officials in preventing the conduct set forth in article 6 of this Protocol and in the humane treatment of migrants who have been the object of such conduct, while respecting their rights as set forth in this Protocol