On May 24, 2019, President Trump signed a presidential memorandum that delegated enforcement authority under the Hizballah International Financing Prevention Act of 2015 to the Secretary of the Treasury and other designated federal officials. Rather than retaining direct presidential control over these sanctions mechanisms, the delegation transferred operational responsibility for implementing and enforcing financial designations and restrictions targeting the Lebanese militant organization to the Treasury Department. This restructuring placed day-to-day authority for identifying financial flows, freezing assets, and designating individuals and entities connected to Hizballah financing activities within established executive agencies rather than the Oval Office.

The practical effect of this delegation extended the reach of federal sanctions enforcement into the global financial system. Foreign banks, money transfer services, cryptocurrency exchanges, and legitimate businesses operating in countries where Hizballah maintains financial networks faced heightened compliance obligations. American financial institutions managing accounts or transactions with any potential connection to designated individuals or entities could face substantial penalties. Charities and humanitarian organizations operating in regions with Hizballah presence encountered increased scrutiny, with Treasury designations potentially freezing their assets without advance notice or opportunity to challenge the determinations.

This action reflects a broader pattern of executive expansion regarding Iran and its designated proxies, evident in subsequent administration actions including the maritime blockade deployment in April 2026 and the continuation of the Iran national emergency in March 2026. By delegating enforcement mechanisms to Treasury, the administration consolidated financial pressure tools outside traditional checks. The memorandum preceded and facilitated later escalations, including the expedited arms deals to Middle East partners in May 2026, which reflected a coordinated strategy combining sanctions enforcement with military support for regional actors.

No significant legal challenges to the delegation itself emerged, though the broader sanctions architecture has faced intermittent scrutiny regarding due process protections for designated entities. The action remained active through subsequent administrations, establishing institutional infrastructure that persisted regardless of executive transitions.