The main purpose of this legislation, known as the McCarty and Heideman Air Safety Enhancement Act, is to improve safety in low-altitude airspace. It requires the Federal Aviation Administration (FAA) to review and update its regulations and policies concerning low-altitude airspace safety, particularly focusing on temporary obstructions like slacklines and similar structures that could pose risks to aircraft. Key provisions of the legislation include a mandate for the FAA Administrator to conduct a comprehensive review of existing safety policies within six months of the law's enactment.