The county board may appoint an executive head of any institution under the supervision and jurisdiction of the board, and may employ such assistants and employes and incur such other expenses as may be necessary to carry out the provisions of this act. The compensation of all assistants and employes, and the number thereof, shall be within the funds made available therefor. Such assistants and employes shall receive their actual and necessary traveling and other expenses incurred in the discharge of their official duties.
MCL 400.51