6. This article shall be without prejudice to any applicable bilateral or multilateral agreement or arrangement that governs, in whole or in part, the return of victims of trafficking in persons. III. Prevention, cooperation and other measures Article 9 Prevention of trafficking in persons 1. States Parties shall establish comprehensive policies, programs and other measures: (a) To prevent and combat trafficking in persons; and (b) To protect victims of trafficking in persons, especially women and children, from revictimization. 2. States Parties shall endeavor to undertake measures such as research, information and mass media campaigns and social and economic initiatives to prevent and combat trafficking in persons. 3. Policies, programs and other measures established in accordance with this article shall, as appropriate, include cooperation with non-governmental organizations, other relevant organizations and other elements of civil society. 4. States Parties shall take or strengthen measures, including through bilateral or multilateral cooperation, to alleviate the factors that make persons, especially women and children, vulnerable to trafficking, such as poverty, underdevelopment and lack of equal opportunity. 5. States Parties shall adopt or strengthen legislative or other measures, such as educational, social or cultural measures, including through bilateral and multilateral cooperation, to discourage the demand that fosters all forms of exploitation of persons, especially women and children, that leads to trafficking. Article 10 Information exchange and training 1. Law enforcement, immigration or other relevant authorities of States Parties shall, as appropriate, cooperate with one another by exchanging information, in accordance with their domestic law, to enable them to determine: (a) Whether individuals crossing or attempting to cross an international border with travel documents belonging to other persons or without travel documents are perpetrators or victims of trafficking in 47