Cal. Health & Safety Code § 34314

An authority may arrange or contract for the furnishing by any person or agency, public or private, of services, privileges, works, or facilities for, or in connection with, a housing project, or a project assisted pursuant to Section 34312.3, or the occupants thereof. Notwithstanding anything to the contrary contained in this chapter or in any other law, an authority may include in any contract let in connection with a project stipulations requiring that the contractor and any subcontractors comply with requirements as to minimum wages and maximum hours of labor and any conditions which the federal government has attached to its financial aid of the project.