1. Without prejudice to international commitments in relation to the free movement of people, States Parties shall strengthen, to the extent possible, such border controls as may be necessary to prevent and detect trafficking in persons.
2. Each State Party shall adopt legislative or other appropriate measures to prevent, to the extent possible, means of transport operated by commercial carriers from being used in the commission of offences established in accordance with article 5 of this Protocol.
3. Where appropriate, and without prejudice to applicable international conventions, such measures shall include establishing the obligation of commercial carriers, including any transportation company or the owner or operator of any means of transport, to ascertain that all 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.