S.C. Code Ann. § 54-3-210

The Authority may make agreements as to the scale of wages, seniority and working conditions with locomotive engineers, locomotive firemen, switchmen and switch engine foremen and hostlers engaged in the operation of the terminal railroads provided for in Section 54-3-200 and the service and equipment pertinent thereto. And should the Authority exercise the power herein given then the Authority shall make such agreements with such employees in accordance with the act of Congress known as the Railway Labor Act (USC Title 45, Sections 151-163) as amended or as hereafter amended to the end that such agreements as to seniority and working conditions will obtain as to such employees and the standard rate of pay be provided as is in force relative to like employees of interstate railroads operating in the same territory with the terminal railroads authorized hereby.