Of the incorporated associations or foundations under the transitional rule that have completed the registration under Article 106, paragraph (1) of the Arrangement Act as applied mutatis mutandis pursuant to Article 121, paragraph (1) of the Arrangement Act following the deemed replacement of terms, a corporation that conducts a retirement allowance mutual aid business and that is specified by Cabinet Order is deemed to be a Domestic Corporation set forth in Appended Table I of the new Income Tax Act, and the provisions of the new Income Tax Act and of other laws and regulations concerning income tax apply to it.