It shall be the duty of the director of revenue to enforce the collection of the delinquent inheritance tax, and the provisions of law with reference thereto. [C24, 27, 31, 35, 39, § 7370; C46, 50, 54, 58, 62, 66, 71, 73, 75, 77, 79, 81, §450.65 ] 2003 Acts, ch 145, §286