When applying this Regulation the best interests of the child should be a primary consideration, in accordance with the 1989 United Nations Convention on the Rights of the Child. In assessing the best interests of the child, Member States’ authorities should, in particular, take due account of the principle of family unity, and the minor’s well-being and social development, linguistic skills, safety and security and the views of that minor with due regard to the minor’s age and maturity.