Before proceeding to act, all deputies shall take the same oaths as their principals take and the oaths shall be filed and entered on the minutes of the same office with the same endorsement thereon; but this Code section shall not apply to any deputy who may be employed in particular cases only. A deputy sheriff may take his oaths before the sheriff and the oaths may be filed in and entered in the records of the sheriff's office.
OCGA § 45-3-7