Notwithstanding any other provision of law, any county, town, or city that is authorized to and has established affordable housing programs may provide by resolution that in determining the award of any contract for time deposits or investment of its funds, the treasurer or director of finance of such county, town, or city may consider, in addition to the typical criteria, the investment activities of qualifying institutions that enhance the supply of, or accessibility to, affordable housing within the jurisdiction, including the accessibility of such housing to employees of the county, town, or city or employees of the local school board. No more than 50 percent of the funds of the county, town, or city, calculated on the basis of the average daily balance of the general fund during the previous fiscal year, may be deposited or invested by considering such investment activities as a factor in the award of a contract. A qualifying institution shall meet the provisions of the Virginia Security for Public Deposits Act (§ 2.2-4400 et seq.) and all local terms and conditions for security, liquidity and rate of return. For the purposes of this section, affordable housing means the same as that term is defined in § 15.2-2201.