2. Calls upon countries of origin, transit and destination to facilitate family reunification as an important objective in order to promote the welfare and the best interest of migrant children, including adolescents, as applicable under national law, due process and the relevant provisions of the Convention on the Rights of the Child 2 and the Optional Protocols thereto, 18 and to comply with the consular notification and access obligations set forth in the Vienna Convention on Consular Relations 7 so that States may provide child-friendly consular assistance, as appropriate, including legal assistance;