Fair return rent increase. In accordance with this Section and rent stabilization regulations adopted by the Director: a landlord may apply to the Director to increase rent for a regulated unit in an amount that exceeds the annual rent increase allowance prescribed in Section 13-144; and the Director shall grant the application if the Director finds that the increase is necessary for the landlord to obtain a fair return on the regulated unit; provided that the applicant fully compensates the County for any costs the Director determines are associated with determining whether the applicant meets the requirements of this Section. For purposes of this Section, fair return means a return on investment: sufficient to offset operating expenses; and commensurate with returns on investments in other enterprises having comparable risks, which is deemed commensurate if an investment's actual annual return (Net Operating Income/Cost Basis) is at least the sum of the actual average 10 year United States Treasury Rate for the annual return period, plus 3%; The Director shall adopt rent stabilization regulations establishing: a formula to determine the rent increase necessary to obtain a fair return for a regulated unit; application requirements, including the information an applicant must submit to demonstrate the rent necessary to obtain a fair return; a uniform system and procedures for processing applications; criteria the Director must use to evaluate and to grant or deny an application; and the duration of a rent increase approved under this Section.