No motor carrier operating under a Certificate of PC&N shall grant, pay, give, or make any allowance to the owner, shipper, consignor, or consignee of any property or shipment, for any service or instrumentality furnished by the owner, shipper, consignor, or consignee, unless such allowance is prescribed or permitted in a lawfully applicable tariff, schedule, or specific order of the commission. Moves may be performed without charge to valid 501(c)(3) organizations.
S.C. Code Regs. § 103-199