Ebony,
They would have to challenge it through the court system. As Glen pointed out, challenges are typically on procedural issues vs. the actual vote count (note: I'm including proxy verification in the procedural issues).
Here is a link to
lexisnexis website that has the TN code. Corporate law is covered under Title 48 with nonprofits starting at Chapter 51.
When you go to the site, you will need to click the agree box. Then open the menu tree on the left side of the screen for Title 48. Once you get to the blue lettering (indicating links) you will be shown that section of the law.
Tim