California Code, Public Contract Code - PCC § 5100

(a) “Public entity” means the state, Regents of the University of California, a county, city and county, city, district, public authority, public agency, and any other political subdivision or public corporation in the state.

(b) “Bid” means any proposal submitted to a public entity in competitive bidding for the construction, alteration, repair, or improvement of any structure, building, road or other improvement of any kind.