Cal. Gov't Code § 65914.8
(a) If a local agency requires, as a condition of approval of the development of residential units, that a certain percentage of the units of the development be affordable housing, the local agency may reserve for artists up to 10 percent of those required affordable housing units if all of the following conditions are satisfied:
(2) The local agency adopts an ordinance for this purpose that does all of the following:
(c) For purposes of this section, the following definitions apply: