(6)Where the order giving rise to a demand of amount for which a certificate for recovery has been issued under section 129 has been modified in appeal or other proceeding under this Code, resulting in reduction of the demand but the order is the subject matter of further proceeding under this Code, the Authorised Officer or the competent authority, as the case may be, shall stay the recovery of such part of the amount of the certificate as pertains to the said reduction for the period for which the appeal or other proceeding remains pending.