Three South Carolina Representatives have introduce HB 3557, which would require that candidates nominated in convention must pay filing fees. The authors are Brandon Newton (R-Lancaster), Fawn Pedalino (R-Manning), and Bill Taylor (R-Aiken).
The U.S. Supreme Court said in Lubin v Panish (1974) that filing fees are unconstitutional unless they are needed for the purpose of keeping ballots from being too crowded. There is no problem with crowded primary ballots when parties nominate by convention. South Carolina lets each party decide for itself whether to nominate by primary or convention, but the two major parties always use primaries and all the minor parties always use conventions.