Supplementary provisions Supplementary provisions 16—18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19Transitional provisions. 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21Interpretation. 22Consequential amendments, repeals and savings. 23Short title, commencement and extent. Supplementary provisions