S.C. Code Ann. § 27-16-130
(C)
(D)
(2)
(a) Single and multi-family residences, including mobile homes, situated on the Reservation are exempt from all property taxes levied by the State, a county, a school district, and a special purpose district if all the following apply:
(iii) for multifamily residences;
a. if the property is valued on a per unit basis, those units which are occupied by a member of the Tribe or the surviving spouse of a deceased member or are unoccupied are exempt from property taxes. All other occupied units are subject to property taxes to the same extent that similar property is assessed and taxed elsewhere in the same jurisdiction. Occupancy is determined on the assessment date for the property;
b. if the property is not valued on a per unit basis, the property is exempt from property taxes based on the percentage of units which are occupied by a member of the Tribe or the surviving spouse of a deceased member of the Tribe, and the property is subject to property taxes to the same extent that similar property is assessed and taxed elsewhere in the same jurisdiction based on the percentage of units not so occupied. In calculating the value, unoccupied units must not be considered. Occupancy is determined on the assessment date for the property;
(E)
(F) Subject to perfected security interests, if a taxpayer subject to property taxes under subsections (D) and (E) fails to pay the taxes, the appropriate taxing authority for the county or other political subdivision has the power to levy against personal property subject to personal property taxes owned by the taxpayer within the county, on or off the Reservation, in order to satisfy the taxes due.
(H) The Tribe, its members, and the Tribal Trust Funds are liable for the payment of all state and local sales and use taxes to the same extent as any other person or entity in the State, except as specifically provided as follows:
(3) During ninety-nine years from the effective date of this chapter, the sale on the Reservation of all other items, made on or off the Reservation, are exempt from state and local sales and use taxes but are subject to a special tribal sales tax levied by the Tribe equal to the state and local sales tax that would be levied in the jurisdiction encompassing the Reservation but for this exemption.
(I) The Tribe shall pay a fee in lieu of school taxes. That fee must be determined by the school district in the same manner and must be the same amount paid by students from outside the county entering schools in the county.