Relating to agreements between border municipalities.

HB 3484 amends Texas law to streamline agreements between border municipalities. It allows cities to formalize cooperative agreements through similar local ordinances (Section 1) and extends funding eligibility to shared infrastructure projects located within 30 miles of a border municipality (Section 2). This directly affects border cities collaborating on facilities like roads or water systems, making them eligible for state grants, loans, and bonds as if the projects were fully within Texas. The bill takes effect in 2025 if approved by a two-thirds vote in both legislative chambers.