(i) where an owner installs new equipment or makes improvements to the individual housing accommodation qualifying for a rent increase pursuant to section 2522.4(a)(1) of this Title, while such housing accommodation is vacant, and where the legal regulated rent is raised on the basis of such rent increase, or as a result of any rent increase permitted upon vacancy or succession as provided in section 2522.8 of this Title, or by a combination of rent increases, as applicable, to the applicable amount qualifying for deregulation, as provided in this subdivision, whether or not the next tenant in occupancy actually is charged or pays the applicable amount qualifying for deregulation, as provided in this subdivision, more for rental of the housing accommodation, the housing accommodation will qualify for exemption under this subdivision;
(ii) subparagraph (i) of this paragraph to the contrary notwithstanding, where the housing accommodation became vacant after March 31, 1997, upon the next re-renting of the housing accommodation between April 1, 1997 and June 18, 1997, where the legal regulated rent at the time the tenant vacated was less than $2,000 per month, rent increases resulting from new equipment or improvements made during that vacancy will not result in exemption under this subdivision;