California Code, Government Code - GOV § 66475.2

(a) There may be imposed by local ordinance a requirement of a dedication or an irrevocable offer of dedication of land within the subdivision for local transit facilities such as bus turnouts, benches, shelters, landing pads, and similar items that directly benefit the residents of a subdivision.  The irrevocable offers may be terminated as provided in subdivisions (c) and (d) of Section 66477.2.

(b) Only the payment of fees in lieu of the dedication of land may be required in subdivisions that consist of the subdivision of airspace in existing buildings into condominium projects, stock cooperatives, or community apartment projects, as those terms are defined in Sections 4105, 4125, and 4190or Sections 6542 and 6566 of the Civil Code.