(1) a provision assigning responsibility for the payment of reasonable and necessary medical expenses for the dependent children;
(2) a provision requiring the purchase and maintenance of appropriate insurance for the medical expenses of dependent children, if coverage is or becomes available at a reasonable cost; and
(3) provisions for income withholding, in accordance with Title 62A, Chapter 11, Part 4, Income Withholding in IV-D Cases,and Part 5, Income Withholding in Non IV-D Cases.