The United States imposed sweeping sanctions on Cuba's state-owned energy company, Unión Cuba-Petróleo (CUPET), on 12 June, escalating Washington's pressure on Havana as the Trump administration accused the Communist government of weaponising energy resources to sustain political repression and enrich its leadership.

The Designation and Its Legal Basis

Secretary of State Marco Rubio announced the designation of CUPET under Section 2(a)(i)(A) of President Donald Trump's Executive Order 14404, citing the company's operation in the energy sector of the Cuban economy. The State Department noted that key assets of CUPET had been 'unlawfully expropriated from American owners years ago,' adding a restitution dimension to the punitive measure.

The sanctions form part of a broader US framework that also draws on Executive Order 14380 and National Security Presidential Memorandum-5, which the administration says are designed to advance human rights, the rule of law, free markets, and democracy in Cuba.

What the US Alleges Against Cuba's Government

Rubio alleged that Cuba's leadership has systematically diverted scarce energy resources for personal and political gain. 'Like every resource on the island, energy has long been weaponized by Cuba's Communist government as a tool of both repression and self-serving regime kleptocracy,' he said in a statement.

He further accused Cuban officials of 'reselling countless barrels of scarce energy on the secondary market, hoarding energy supplies for its military, intelligence and repressive forces, and rationing energy as a tool of social control.' Rubio contrasted this with the hardships faced by ordinary Cubans, who reportedly wait weeks to refuel vehicles and endure persistent blackouts, while, he alleged, luxury tourist hotels and regime-connected individuals maintain uninterrupted power.

How the Sanctions Work

Under the designation, all property and interests belonging to CUPET that are located in the United States or under the control of US persons must be frozen and reported to the Treasury Department's Office of Foreign Assets Control (OFAC). Transactions involving CUPET are prohibited unless specifically authorised by OFAC.

The State Department issued a caution to non-US parties as well, warning that foreign individuals, companies, and financial institutions engaging with sanctioned entities — or operating in designated sectors of the Cuban economy — could themselves face sanctions exposure. Transferring or returning assets to sanctioned entities, it added, carries 'significant sanctions risk.'

Decades of Sanctions, Renewed Pressure

The United States has maintained an economic sanctions regime against Cuba for more than six decades, making it one of the longest-running such regimes in modern history. Successive administrations have periodically adjusted the scope of restrictions and engagement policies, but core sanctions have largely remained intact. The Trump administration's targeting of CUPET represents one of the most direct strikes at Cuba's energy infrastructure within that broader framework.

The State Department framed the ultimate objective in measured terms: 'The ultimate goal of sanctions is not to punish, but to bring about a positive change in behavior.' Whether Havana adjusts course — or deepens its reliance on alternative energy partners — will determine the real-world impact of this latest escalation.