S.C. Code Ann. § 44-96-150
(F) Not later than eighteen months after this chapter is effective, no person shall distribute, sell, or offer for sale in this State a plastic bottle or rigid plastic container unless such bottle or container is labeled with a code identifying the appropriate resin type used to produce the structure of the container. The code shall consist of a number placed within three triangulated arrows. The three arrows shall form an equilateral triangle with the common point of each line forming each angle of the triangle at the midpoint of each arrow and rounded with a short radius. The arrowhead of each arrow shall be at the midpoint of each side of the triangle with a short gap separating the arrowhead from the base of the adjacent arrow. The triangle formed by the three arrows curved at their midpoints shall depict a clockwise path around the code number. The label shall appear on or near the bottom of the plastic container product and be clearly visible. The numbers and letters shall be as follows:
(7) for any other, the letters "OTHER" and the number "7".
Nothing in this subsection may prevent a manufacturer or distributor of containers that are produced from a plastic resin not identified in this subsection from adopting a labeling code number and letter that will assist in the segregation and collection of that resin for recycling if the code number and letter used are nationally recognized industry standards.