Section 21. The Local Government may, within five years from the publication of any notification under section n

21. The Local Government may, within five years from the publication of any notification under section nineteen, revise any arrangement made under section fourteen or seventeen, and may, for this purpose, rescind or modify any order made under section fourteen or seventeen, and direct that any one of the proceedings specified in section fourteen be taken in lieu of any other of such proceedings, or that the rights admitted under section eleven be commuted under section fifteen.