The main purpose of this legislation, known as the "No Data Center NDAs Act," is to prevent Members of Congress from signing nondisclosure agreements (NDAs) related to data centers. The goal is to ensure transparency and accountability in the planning and development of data centers, which are facilities used to house computer systems and associated components. Key provisions of the act include a clear prohibition against Members of Congress signing NDAs with state or local governments or private entities when it comes to accessing information about data centers.