421.Section 163 makes amendments to section 25 of the Children Act 2004 (co-operation to improve well-being: Wales). These amendments are made to ensure the existing duty in the 2004 Act to make arrangements to promote co-operation to improve the well-being of children is aligned with the new duty in section 162 of this Act (Arrangements to promote cooperation: adults with needs for care and support and carers). In particular, the definition of “well-being” in section 2 of this Act is imported into section 25 of the 2004 Act in place of the current definition, together with a new definition of ”care and support”.