California Code, Public Contract Code - PCC § 20132

The board of supervisors of any county may delegate to the county administrative officer or the county executive officer in an equivalent position, the power to enter into and execute on behalf of the county any contracts, which do not involve the expenditure of more than five thousand dollars ($5,000), which relate to purposes previously approved and budgeted by the board of supervisors, subject to ratification of such approval and execution by the board of supervisors. This section shall not apply to: