lease. In such event, such sublease shall be subject to the tenant's right to a renewal lease. The subtenant shall have no right to a renewal lease. It shall be unreasonable for an owner to refuse to consent to a sublease solely because such sublease extends beyond the tenant's lease; and (h) notwithstanding the provisions of section two hundred twenty-six-b of the real property law, a not-for-profit hospital shall have the right to sublet any housing accommodation leased by it to its affiliated personnel without requiring the landlord's consent to any such sublease and without being bound by the provisions of subparagraphs (b), (c) and (f) of this paragraph. Commencing with the effective date of this subparagraph, whenever a not-for-profit hospital executes a renewal lease for a housing accommodation, the legal regulated rent shall be increased by a sum equal to fifteen percent of the previous lease rental for such housing accommodation, hereinafter referred to as a vacancy surcharge, unless the landlord shall have received within the seven year period prior to the commencement date of such renewal lease any vacancy increases or vacancy surcharges allocable to the said housing accommodation. In the event the landlord shall have received any such vacancy increases or vacancy surcharges during such seven year period, the vacancy surcharge shall be reduced by the amount received by any such vacancy increase or vacancy surcharges.