A/HRC/RES/12/6 page 3 (b) Calls upon States to establish or strengthen policies and programmes aimed at addressing the situation of children in the context of migration that have a human rights-based approach and are based on general principles, such as the best interests of the child, non-discrimination, participation and survival and development; (c) Also calls upon States that have not signed and ratified or acceded to the Convention on the Rights of the Child and the Optional Protocols thereto, and the International Convention on the Protection of the Rights of All Migrant Workers and Members of Their Families to consider doing so as a matter of priority; 2. Also calls upon States of origin to take appropriate measures to promote and protect effectively the rights of children who are left behind in their country of origin by migrating family members, including by: (a) Development of data on the situation of children left behind in countries of origin in order to better understand the impact of migration processes on their well-being and enjoyment of their human rights; (b) Undertaking, in cooperation with relevant organizations, information campaigns with a child perspective aimed at clarifying prospects, limitations, potential risks and rights in the event of migration, in order to enable everyone, in particular children and their family members, to make informed decisions and to prevent them from becoming victims of trafficking or falling prey to transnational organized networks of smugglers or organized criminal groups; (c) Strengthening relevant national institutions to address the particular needs of children left behind in their country of origin; 3. Further calls upon States to protect the human rights of children in the context of migration, and therefore: (a) Calls upon States parties to the United Nations Convention against Transnational Organized Crime and the supplementing protocols thereto, namely, the Protocol against the Smuggling of Migrants by Land, Sea and Air and the Protocol to Prevent, Suppress and Punish Trafficking in Persons, Especially Women and Children, to implement them fully, and calls upon States that have not yet ratified or acceded to them to consider doing so as a matter of priority; (b) Encourages States to establish institutionalized services and implement programmes to provide age- and gender-sensitive support and protection to migrant children, with due regard for the specific needs of children in vulnerable situations, such as unaccompanied children, girls, children with disabilities and those who may be in need of international refugee protection; (c) Requests all States to take concrete measures to prevent the violation of the human rights of migrant children while in transit, and to train public officials to detect and treat them respectfully, in a sensitive and age-appropriate manner and in accordance with their international obligations; (d) Calls upon States to ensure that migrant children, especially those who are unaccompanied and those who are victims of violence, exploitation, persecution and conflict, receive special protection and assistance, in accordance with their international obligations;