BRUSSELS, May 18 (Xinhua) -- European Union (EU) foreign policy chief on Friday gave full marks to the bloc's quick response to Washington's withdrawal from the landmark Iran nuclear deal.

In a statement following the European Commission's proposal to activate a dormant statute, EU top diplomat Federica Mogherini said the steps "are a strong confirmation" of the EU commitments to uphold the deal.

"The EU is acting in unity and swiftly to preserve the Joint Comprehensive Plan of Action (JCPOA)," she said, citing a flurry of diplomatic activities this week, including the meeting between European foreign ministers and their Iranian counterpart on Tuesday, and an informal summit of EU leaders on Thursday.

"In the meantime, intensive expert discussions have been launched to arrive at practical solutions in order to maintain and deepen economic relations with Iran," she added.

The European Commission on Friday proposed to activate a dormant statute to shield European firms doing business with Iran from renewed U.S. sanctions.

The 1996 Blocking Statute forbids EU companies from complying with the U.S. sanctions.

The statute was originally introduced in response to a U.S. trade embargo on Cuba and sanctions against Iran and Libya. It was never enacted as the transatlantic disagreements were ironed out politically.

The Commission also proposed removing "obstacles for the European Investment Bank (EIB) to decide under the EU budget guarantee to finance activities outside the European Union, in Iran."

In other words, the EIB will be allowed to support EU investment in Iran.

The European Parliament and the Council of the EU will decide to approve or reject the proposals within two months, ahead of the first batch of U.S. sanctions that will take effect on Aug. 6.

The two proposals are the core parts of the Commission's decision to act on four fronts in the face of looming U.S. sanctions.

The commission vowed to "continue and strengthen the ongoing sectoral cooperation with, and assistance to, Iran, including in the energy sector," which is essential to the Iranian economy.

It remains to be seen whether this promise will dispel concerns haunting European energy giants like Total, which on Wednesday said it might not be able to continue its gas development project in Iran unless it gets a waiver from the United States to protect it from reimposed sanctions.

To weave through the U.S.-dominated international banking system, the Commission said it is encouraging member states to explore the possibility of one-off bank transfers to the Central Bank of Iran.

This approach "could help the Iranian authorities receive their oil-related revenues, particularly in case of U.S. sanctions which could target EU entities active in oil transactions with Iran," the Commission noted.

U.S. President Donald Trump declared last week that the United States would withdraw from the Iran nuclear deal, claiming it had failed to prevent Iran from developing nuclear weapons or supporting terrorism in the region.

U.S. Treasury Secretary Steven Mnuchin said in an announcement that "sanctions will be reimposed subject to certain 90-day and 180-day wind-down periods."

Much to Europe's displeasure, foreign companies doing business with Iran are also at the crosshairs of the U.S. sanctions.