Bans owners or operators of covered U.S. port facilities from entering contracts that would allow Chinese, Russian, North Korean, or Iranian state‑owned enterprises—or any foreign entity with any ownership by those governments—to own, lease, or operate those facilities.

It uses existing maritime security law definitions to set the scope, focusing on facilities covered by Area Maritime Transportation Security Plans. The measure aims to reduce national security risks from foreign control or influence at U.S. ports and will require added ownership vetting before signing new terminal or facility agreements.