(9) A landlord may impose a rent increase to recover costs incurred for the remediation of lead hazards, as defined in San Francisco Health Code Article 11 or 26. Such increases may be based on changes in operating and maintenance expenses or for capital improvement expenditures as long as the costs which are the basis of the rent increase are a substantial portion of the work which abates or remediates a lead hazard, as defined in San Francisco Health Code Article 11 or 26, and provided further that such costs are approved for operating and maintenance expense increases pursuant to Section 37.8(e)(4)(A) and certified as capital improvements pursuant to Section 37.7 below.
When rent increases are authorized by this Subsection 37.3(a)(9), the total rent increase for both operating and maintenance expenses and capital improvements shall not exceed 10 percent in any 12 month period. If allowable rent increases due to the costs of lead remediation and abatement work exceed 10 percent in any 12 month period, an Administrative Law Judge shall apply a portion of such excess to approved operating and maintenance expenses for lead remediation work, and the balance, if any, to certified capital improvements, provided, however, that such increase shall not exceed 10 percent. A landlord may accumulate any approved or certified increase which exceeds this amount, subject to the 10 percent limit.
(10) With respect to units occupied by recipients of tenant-based rental assistance:
(A) If the tenant's share of the base rent is not calculated as a fixed percentage of the tenant's income, such as in the Housing Choice Voucher Program and the Over-FMR Tenancy Program, or if the tenant is receiving assistance under the HOPWA rental subsidy program, then: