Provided also that the service benefits already extended to the persons for the service other than regular service shall stand withdrawn.

Validity of rules and orders, etc No rule, regulation, order, direction, or notification made or published and no adjudication, inquiry or act done under any of the provisions of this Act or the rules made thereunder, which is substantially in consonance with the same, shall be deemed to be illegal, void or invalid only by reason of any defect or form.