Requires the State Department to assess Iranian and Hezbollah activities and networks in Latin America, to work with partners to pressure governments that allow those networks to operate, and to support stronger local laws and terrorist designations. Authorizes the President to impose visa‑related sanctions on foreign government officials tied to jurisdictions designated as "terrorist sanctuaries," revoking visas and making those individuals inadmissible, with limited waivers and reporting requirements. The law requires the assessment within 180 days and sunsets the sanctions after five years.