The main purpose of this legislation is to enhance cybersecurity for rural and municipal electric utilities. It aims to reauthorize and improve the Rural and Municipal Utility Advanced Cybersecurity Grant and Technical Assistance Program, which provides support to these utilities in protecting their systems from cyber threats. Key provisions of the legislation include the establishment of a program to offer technical assistance and funding to eligible entities, which are defined as rural electric cooperatives, municipal electric utilities, and certain small investor-owned utilities.