The board of commissioners of any electric light, water supply, fire protection or sewerage district may avail itself of any provision for loans to construct electric light systems, water supply systems, fire protection systems or sewerage systems from the United States Government, through any office or agency thereof, and may issue revenue bonds pledging the income from any such system in liquidation of any loan made as aforesaid by the United States Government.
S.C. Code § 6-11-250