Is a city dispatcher entitled to overtime compensation when the city does not have an appropriation for overtime?

dispatchers was work in excess of the eight-hour day, and the employees' right to overtime compensation, mandated by the city regulations, vested upon performance." ( Id . at pp. 413-414, 204 Cal.Rptr. 422, 682 P.2d 1087 ; see also Longshore v. County of Ventura (1979) 25 Cal.3d 14, 22, 157 Cal.Rptr. 706, 598 P.2d 866 ["A claim for compensation owed by an employer for services already performed is contractual ..."].) In White , our high court concluded that, although employees who worked during a budget impasse had no right to the immediate payment of salary in the absence of a duly enacted appropriation, "employees who work during a budget impasse obtain a right, protected by the contract clause , to the ultimate payment of salary that has been earned." ( White , supra , 30 Cal.4th at pp. 570-571, 133 Cal.Rptr.2d 648, 68 P.3d 74.)