U.S. Sanctions Central Bank Of Iran After Saudi Oil Attacks

The US imposed new sanctions on Iran's central bank, accusing it of funding terrorism. President Trump stated these measures are due to Iran's alleged involvement in attacks on Saudi oil facilities. Iran's Foreign Minister Zarif criticized the sanctions as desperate and harmful to Iran's ability to provide essentials for its people. The sanctions aim to pressure Iran to stop funding terrorist groups.

What did Zarif claim about the effectiveness of the US sanctions?

What must the Central Bank of Iran prove according to the sanctions?