Any exemption granted under section 34 of the Basic Conditions of Employment Act, 1983, in force immediately before the commencement of this Act remains in force for the period for which the exemption was granted, or if the exemption was granted for an indefinite period, for a period of six months after the commencement of this Act as if that Act had not been repealed, unless it is withdrawn by the Minister, before the end of such period.