(13) provides that an owner is entitled to a rent increase where there has been a substantial modification or increase of dwelling space, or installation of new equipment or improvements or new furniture or furnishings provided in or to a tenant's housing accommodation, on written informed tenant consent to the rent increase. In the case of a vacant housing accommodation, tenant consent shall not be required. Except as provided in subparagraph (B) of this paragraph, increase in the legal regulated rent for the affected housing accommodation shall be one-one hundred sixty-eighth, in the case of a building with thirty-five or fewer housing accommodations or one-one hundred eightieth in the case of a building with more than thirty-five housing accommodations where such increase takes effect on or after the effective date of the chapter of the laws of two thousand nineteen that amended this paragraph, of the total actual cost incurred by the landlord in providing such reasonable and verifiable modification or increase in dwelling space, furniture, furnishings, or equipment, including the cost of installation but excluding finance charges and any costs that exceed reasonable costs established by rules and regulations promulgated by the division of housing and community renewal. Such rules and regulations shall include: (i) requirements for work to be done by licensed contractors and prohibit common ownership between the landlord and the contractor or vendor; and (ii) a requirement that the owner resolve within the dwelling space all outstanding hazardous or immediately hazardous violations of the Uniform Fire Prevention and Building Code (Uniform Code), New York City Fire Code, or New York City Building and Housing Maintenance Codes, if applicable. Provided further that an