Repeal of promissory notes stamp law preserves prior operation, rights, obligations and validation despite the repeal. Section 70 repeals the Promissory Notes (Stamp) Act, 1926 but preserves the previous operation of that Act and anything duly done under it; it protects any right, privilege, obligation or liability acquired, accrued or incurred under the Act and validates the execution of promissory notes effected under the repealed statute.