California Code, Health and Safety Code - HSC § 51226

(a) Subject to the availability of adequate subsidies, not less than 30 percent of the combined total units financed by mortgage loans and property improvement loans pursuant to this part during each fiscal year shall be made available on a priority basis to very low income households. Subject to the availability of adequate subsidies, not less than 20 percent of the units in each housing development shall be made available on a priority basis to very low income households, except that such requirement shall not apply to housing developments of less than 12 units where the agency finds it is not necessary to make units available in the development for very low income households to meet the requirement of making 30 percent of total units available to very low income households. In housing developments for which the agency provides a construction loan but not a mortgage loan, not less than 20 percent of the units shall be made available on a priority basis to lower income households. Units required to be made available on a priority basis pursuant to this section, shall be offered exclusively to those within the priority group unless or until the agency permits the unit to be offered to other potential occupant groups.

(b) In rental housing developments for which the agency provides insurance but not construction or mortgage loans, not less than 10 percent of the units shall be made available on a priority basis to lower income households. These units shall be of comparable quality and offer a range of sizes and number of bedrooms comparable to the range of those units which are available for other tenants.

(c) The agency shall actively and aggressively pursue all available federal housing programs and utilize fully all available subsidies in order to achieve the purposes of this section.