(A) The assistance contract shall provide for adjustment annually or more frequently in the maximum monthly rents for units covered by the contract to reflect changes in the fair market rentals established in the housing area for similar types and sizes of dwelling units or, if the Secretary determines, on the basis of a reasonable formula. However, where the maximum monthly rent, for a unit in a new construction, substantial rehabilitation, or moderate rehabilitation project, to be adjusted using an annual adjustment factor exceeds the fair market rental for an existing dwelling unit in the market area, the Secretary shall adjust the rent only to the extent that the owner demonstrates that the adjusted rent would not exceed the rent for an unassisted unit of similar quality, type, and age in the same market area, as determined by the Secretary. The immediately foregoing sentence shall be effective only during fiscal year 1995, fiscal year 1996 prior to April 26, 1996 , and fiscal years 1997 and 1998, and during fiscal year 1999 and thereafter. Except for assistance under the certificate program, for any unit occupied by the same family at the time of the last annual rental adjustment, where the assistance contract provides for the adjustment of the maximum monthly rent by applying an annual adjustment factor and where the rent for a unit is otherwise eligible for an adjustment based on the full amount of the factor, 0.01 shall be subtracted from the amount of the factor, except that the factor shall not be reduced to less than 1.0. In the case of assistance under the certificate program, 0.01 shall be subtracted from the amount of the annual adjustment factor (except that the factor shall not be reduced to less than 1.0), and the adjusted rent shall not exceed the rent for a comparable unassisted unit of similar quality, type, and age in the market area. The immediately foregoing two sentences shall be effective only during fiscal year 1995, fiscal year 1996 prior to April 26, 1996 , and fiscal years 1997 and 1998, and during fiscal year 1999 and thereafter. In establishing annual adjustment factors for units in new construction and substantial rehabilitation projects, the Secretary shall take into account the fact that debt service is a fixed expense. The immediately foregoing sentence shall be effective only during fiscal year 1998.

(B) The contract shall further provide for the Secretary to make additional adjustments in the maximum monthly rent for units under contract to the extent he determines such adjustments are necessary to reflect increases in the actual and necessary expenses of owning and maintaining the units which have resulted from substantial general increases in real property taxes, utility rates, or similar costs which are not adequately compensated for by the adjustment in the maximum monthly rent authorized by subparagraph (A). The Secretary shall make additional adjustments in the maximum monthly rent for units under contract (subject to the availability of appropriations for contract amendments) to the extent the Secretary determines such adjustments are necessary to reflect increases in the actual and necessary expenses of owning and maintaining the units that have resulted from the expiration of a real property tax exemption. Where the Secretary determines that a project assisted under this section is located in a community where drug-related criminal activity is generally prevalent and the project’s operating, maintenance, and capital repair expenses have been substantially increased primarily as a result of the prevalence of such drug-related activity, the Secretary may (at the discretion of the Secretary and subject to the availability of appropriations for contract amendments for this purpose), on a project by project basis, provide adjustments to the maximum monthly rents, to a level no greater than 120 percent of the project rents, to cover the costs of maintenance, security, capital repairs, and reserves required for the owner to carry out a strategy acceptable to the Secretary for addressing the problem of drug-related criminal activity. Any rent comparability standard required under this paragraph may be waived by the Secretary to so implement the preceding sentence. The Secretary may (at the discretion of the Secretary and subject to the availability of appropriations for contract amendments), on a project by project basis for projects receiving project-based assistance, provide adjustments to the maximum monthly rents to cover the costs of evaluating and reducing lead-based paint hazards, as defined in section 4851b of this title .

(C) Adjustments in the maximum rents under subparagraphs (A) and (B) shall not result in material differences between the rents charged for assisted units and unassisted units of similar quality, type, and age in the same market area, as determined by the Secretary. In implementing the limitation established under the preceding sentence, the Secretary shall establish regulations for conducting comparability studies for projects where the Secretary has reason to believe that the application of the formula adjustments under subparagraph (A) would result in such material differences. The Secretary shall conduct such studies upon the request of any owner of any project, or as the Secretary determines to be appropriate by establishing, to the extent practicable, a modified annual adjustment factor for such market area, as the Secretary shall designate, that is geographically smaller than the applicable housing area used for the establishment of the annual adjustment factor under subparagraph (A). The Secretary shall establish such modified annual adjustment factor on the basis of the results of a study conducted by the Secretary of the rents charged, and any change in such rents over the previous year, for assisted units and unassisted units of similar quality, type, and age in the smaller market area. Where the Secretary determines that such modified annual adjustment factor cannot be established or that such factor when applied to a particular project would result in material differences between the rents charged for assisted units and unassisted units of similar quality, type, and age in the same market area, the Secretary may apply an alternative methodology for conducting comparability studies in order to establish rents that are not materially different from rents charged for comparable unassisted units. If the Secretary or appropriate State agency does not complete and submit to the project owner a comparability study not later than 60 days before the anniversary date of the assistance contract under this section, the automatic annual adjustment factor shall be applied. The Secretary may not reduce the contract rents in effect on or after April 15, 1987 , for newly constructed, substantially rehabilitated, or moderately rehabilitated projects assisted under this section (including projects assisted under this section as in effect prior to November 30, 1983 ), unless the project has been refinanced in a manner that reduces the periodic payments of the owner. Any maximum monthly rent that has been reduced by the Secretary after April 14, 1987 , and prior to November 7, 1988 , shall be restored to the maximum monthly rent in effect on April 15, 1987 . For any project which has had its maximum monthly rents reduced after April 14, 1987 , the Secretary shall make assistance payments (from amounts reserved for the original contract) to the owner of such project in an amount equal to the difference between the maximum monthly rents in effect on April 15, 1987 , and the reduced maximum monthly rents, multiplied by the number of months that the reduced maximum monthly rents were in effect.