All motor carriers will be held to strict account for the use of their operating rights, and to permit the use of the same by others for the transportation of persons or property for compensation without prior approval of the commission shall be deemed just cause for the revocation of such rights. This rule positively forbids the party to whom operating rights have been granted from permitting others to use the name or operating authority of such party without prior approval of the commission, or until execution of a proper lease agreement as described in R. 103-220.
S.C. Code Regs. § 103-156