Section 502 - Assistant county attorneys1. The board of supervisors shall have power to authorize the county attorney to appoint one or more assistant county attorneys. Every appointment of an assistant county attorney shall be in a writing filed and recorded in the office of the county clerk. The person so appointed shall take the prescribed oath of office and furnish any required official undertaking. Any such appointment may be revoked by the county attorney at any time by filing a written revocation in the office of the county clerk.2. The assistant county attorney shall perform such duties pertaining to the office as may be directed by the county attorney.3. The assistant, during the absence or inability of the county attorney, shall perform the powers and duties of the office of county attorney.4. In the event of a vacancy in the office of county attorney, the assistant shall perform the powers and duties of the office of county attorney until a successor is appointed and has qualified.5. If more than one assistant county attorney shall be appointed, the county attorney shall designate in writing and file in the office of the county clerk and clerk of the board of supervisors the order in which such assistants shall exercise the powers and duties of the office in the event of a vacancy or the absence or inability of such county attorney to perform the duties of the office.