The main purpose of this legislation is to change the tax status of the Council on American-Islamic Relations (CAIR). Specifically, it aims to prevent CAIR from being classified as a tax-exempt organization under a specific section of the Internal Revenue Code, which typically allows non-profit organizations to operate without paying federal income taxes. Key provisions of the legislation include a clear statement that CAIR will not be recognized as a 501(c)(3) organization. This means that CAIR would lose its tax-exempt status, which could significantly impact its funding and operations.