Candidates can challenge each other's petition for validity of the signatures on the petition. (udodistrictleaders.com)
We are currently planning a clinical trial to evaluate the clinical validity of our signature. (ifom-ieo-campus.it)
If anyone contests the validity of the signatures by Monday, a Will County elections board will make a decision by Sept. 6 on whether the issue can go on the ballot. (articles.chicagotribune.com)