A bank that, at the time this Act comes into effect, has obtained the authorization under Article 52-2, paragraph (1) of the Banking Act as before the amendment by the provisions of Article 1 and is actually engaged in the foreign bank agency services prescribed in that paragraph, is, if it has notified the Prime Minister, pursuant to the provisions of Cabinet Office Order, by the day on which three months have elapsed from the day this Act comes into effect (hereinafter referred to as the "effective date"), of the foreign bank group prescribed in paragraph (2) of Article 52-2 of the new Banking Act to which the principal foreign bank prescribed in paragraph (1) of that Article belongs, deemed to be a bank that has obtained the authorization under paragraph (2) of that Article for that foreign bank group.