S.C. Code Ann. § 50-23-375: Display of number or decal on watercraft or outboard motor other than that for which it was issued.

It is unlawful to display a registration number or a validation decal or sailboat title decal on any watercraft except on the watercraft for which it was issued. It is unlawful to display an outboard motor registration decal on any outboard motor except on the outboard motor for which it was issued.