(3) in the case of an eligible business, nonresidential premises which are located in the eligible Lower Manhattan area, for which a lease or a contract to purchase is first entered into by an eligible business on or after July first, two thousand three and for which a minimum expenditure has been made on or after such date, for improvements in excess of twenty-five dollars per square foot, or in the case of a special eligible business, non-residential premises that are located in the eligible Lower Manhattan area for which a lease or a contract to purchase is first entered into by the eligible business after June thirtieth, two thousand five, and for which a minimum expenditure has been made after such date for improvements in excess of twenty-five dollars per square foot, provided, however, that, in either case, if such premises are leased, such lease shall have a term that does not expire until at least three years after the later of the date of relocation and the lease commencement date. Notwithstanding the provisions of paragraphs one and two of this subdivision, if, subsequent to date of certification, the property in which such premises are contained ceases to meet the requirements of paragraph one or two of this subdivision, such premises shall nonetheless remain eligible premises, provided that the eligible business or special eligible business continues to occupy such premises; provided however that if, after such property ceases to meet the requirements of such paragraph one or two, an eligible business or special eligible business first leases or purchases additional premises contained in such property, such additional premises shall not be considered eligible premises unless they meet the requirements of paragraph three of this subdivision.