Article 18. In cases where an individual has transferred house used by him as residence, land on which such house stands, or right on such land, and, has acquired, within a period beginning one year prior to the date of such transfer and ending one year after such date, the house used as his residence, land on which such house stands or right on such land, and where the property thus acquired (hereinafter referred to as "acquired residential property" ) constitutes, during a term as prescribed by Ordinance, the house used by him as residence, land on which such house stands or right on such land (excluding the case where the acquired property constitutes, during such a term, a house not used as residence, land on which such a house stands, or right on such land), the acquired residential property shall, for the application of the provision of Article 9 paragraph 1 of the Income Tax Law, be considered, as may be prescribed by Ordinance, to have been transferred only to such extent as the receipt from transfer of property thus transferred (hereinafter referred to as "transferred residential property" ) if it exceeds the acquisition cost of the acquired residential property, or be deemed not to have been transferred if the receipt from transfer of such transferred residential property is not more than the acquisition cost of the acquired residential property.