The February 15 issue of the Lincoln Tribune, a newspaper in Lincolnton, North Carolina, has this thorough story on North Carolina’s ballot access laws for minor parties.
The story contains many facts, all of which are correct, except toward the end it says South Carolina has never had more than four political parties on the ballot. South Carolina currently has eight qualified parties. South Carolina’s petition requirement for new parties, 10,000 signatures, is rather difficult. However, South Carolina makes it extremely easy for parties to remain ballot-qualified. All they need to do is run at least one candidate at least once every four years.