The Enhanced Iran Sanctions Act of 2025 refers to companion bills H.R. 1422 and S. 556 in the 119th Congress, targeting Iranian oil logistical networks and financial intermediaries by imposing mandatory visa- and property-blocking sanctions on foreign persons, including financial institutions, insurers, and ship registries, that knowingly engage in transactions related to the processing, export, sale, or transfer of Iranian oil, condensates, gas, liquefied natural gas, or petrochemical products after enactment. The legislation aims to deny Iran revenue for nuclear weapons development, terrorism, missiles, and repression, expanding enforcement through an interagency working group, multilateral coordination, and a rewards program. Exceptions apply for humanitarian aid and vessel safety, with case-by-case waivers possible. It builds on prior laws such as the Stop Harboring Iranian Petroleum Act and the Iran Sanctions Act of 1996. H.R. 1422 passed the House and was received in the Senate on 2026-03-17. The bill is supported by AIPAC.