On August 15, a lower Pennsylvania state court removed two independent candidates from the Harrisburg ballot, for city elections on November 5, 2013. See this story. The two candidates didn’t fill out the “substitution committee” blank on their petitions. A “substitution committee” has the authority to replace the candidates listed on the petition, if those candidates die or withdraw. It doesn’t make sense to have a mandatory “substitution committee” for independent candidates. That part of the petition is more to assist minor parties, who could be expected to want to replace any nominee who couldn’t run, but the same logic doesn’t apply to independent candidates. Thanks to Curtis Boyd for the link.