The main purpose of this legislation is to enhance security along the southern border of the United States by requiring the Department of Homeland Security to conduct regular assessments of the tactical infrastructure in that area. The goal is to identify any weaknesses or deficiencies in the existing security measures and technology, ensuring that they are effective in fulfilling their intended roles. Key provisions of the legislation include a mandate for the Secretary of Homeland Security to carry out a survey of the tactical infrastructure every two years.