Any reassessment, notice, demand, collection grace period, acceptance of security, or filing of a return, application, request, certification, consignment of payment or other disposition or procedure carried out before the enforcement of this Act pursuant to the provisions of the national tax laws in force before the enforcement of this Act (hereinafter referred to as the "former tax laws") or the provisions of orders based on them or for their implementation, for which this Act has corresponding provisions, is deemed to be the corresponding disposition or procedure carried out under the corresponding provisions of this Act, except as otherwise provided in these Supplementary Provisions or in other national tax laws.