S.C. Code Ann. § 58-3-310
The law enforcement department of the Public Service Commission shall consist of such officers, inspectors and agents as the commission may deem necessary and proper for the enforcement of the Motor Vehicle Carrier Law and other related laws, the enforcement of which is devolved upon the department. The title of such officers, inspectors and agents shall be "Transportation Division Inspectors." The inspectors shall be commissioned by the Governor upon the recommendation of the commission. The commission may remove an inspector if it finds that he is unfit for the position.