S.C. Code Ann. § 31-3-350

No commissioner shall receive any compensation, whether in the form of salary, per diem allowances or otherwise, for or in connection with his services as such commissioner. Each commissioner shall, however, be entitled to reimbursement, to the extent of appropriations or other funds available therefor, for any necessary expenditures in connection with the performance of his general duties or in connection with the construction or operation of any project. The authority may allocate such expenses among its projects in such manner as it may consider proper.