California Code, Government Code - GOV § 53395.3

(a) A district may finance (1) the purchase, construction, expansion, improvement, seismic retrofit, or rehabilitation of any real or other tangible property with an estimated useful life of 15 years or longer which satisfies the requirements of subdivision (b), (2) may finance planning and design work which is directly related to the purchase, construction, expansion, or rehabilitation of that property and (3) the costs described in Sections 53395.5, and 53396.5. A district may only finance the purchase of facilities for which construction has been completed, as determined by the legislative body. The facilities need not be physically located within the boundaries of the district. A district may not finance routine maintenance, repair work, or the costs of ongoing operation or providing services of any kind.

(b) The district shall finance only public capital facilities of communitywide significance, which provide significant benefits to an area larger than the area of the district, including, but not limited to, all of the following:

(c) Any district which constructs dwelling units shall set aside not less than 20 percent of those units to increase and improve the community's supply of low- and moderate-income housing available at an affordable housing cost, as defined by Section 50052.5 of the Health and Safety Code, to persons and families of low- and moderate-income, as defined in Section 50093 of the Health and Safety Code.