With regard to a worker for whom an employer has, at the time this Act comes into effect, obtained permission from the Director of the Prefectural Labor Bureau or the Director of the District Transport Bureau (including the Director of the Transport Supervision Department) under the provisions of Article 8 of the Minimum Wage Act prior to the amendment by this Act (hereinafter referred to as "the former Act"), or Article 8 of the former Act as applied with the replacement of terms pursuant to Article 40 of the former Act, the provisions of Article 4 of the Minimum Wage Act as amended by this Act (hereinafter referred to as "the new Act") do not apply for one year from the day this Act comes into effect; provided, however, that this does not apply where, within that period, the permission of the Director of the Prefectural Labor Bureau or the Director of the District Transport Bureau (including the Director of the Transport Supervision Department) has been obtained for that worker under the provisions of Article 7 of the new Act, or Article 7 of the new Act as applied with the replacement of terms pursuant to Article 35, paragraph (2) of the new Act.