This legislation mandates that the Comptroller General of the United States undertake a comprehensive study. The primary focus of this study is to examine existing Federal programs, rules, and authorities that either facilitate or hinder wildfire mitigation efforts across different land ownership boundaries, encompassing both Federal and non-Federal lands. The study will specifically assess whether modifications to these identified programs or rules could enhance the capacity or access to funding for various entities, including Federal land management agencies, the Department of Agriculture, FEMA, and State, local, and Tribal governments, to mitigate wildfires. Additionally, it requires an evaluation of activities under the Healthy Forests Restoration Act of 2003, focusing on their efficacy and impact on funding access for wildfire mitigation. Within two years, the Comptroller General must submit a report detailing the study's findings and providing recommendations to streamline cross-boundary wildfire mitigation.