S.C. Code Ann. § 58-3-310

The law enforcement department of the Office of Regulatory Staff shall consist of such officers, inspectors, and agents as the Executive Director of the Office of Regulatory Staff considers 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 Executive Director of the Office of Regulatory Staff. The Executive Director of the Office of Regulatory Staff may remove an inspector if he finds that the inspector is unfit for the position.