India will use escrow accounts of five Iranian banks held with UCO Bank Ltd. to deposit money for oil purchases from the Middle East producer to overcome U.S. sanctions, according to people with knowledge of the matter.

Iran will use part of the deposits for purchasing essential goods from India and to meet expenditure incurred by its diplomatic missions in the South Asian nation, the people said, asking not to be identified because the information isn’t public. All spending will be in Indian rupees.

Continued supplies is crucial for India, a country that imports nearly 80 percent of its annual crude requirement, as Tehran offers better credit terms than other Middle East oil producers and, in the past, has accepted payments in Indian rupees, rather than U.S. dollars. The south Asian nation purchased crude worth about $9 billion from Iran in the financial year ended March 31.

The payment mechanism will allow India to continue oil purchases despite sanctions. Washington has also granted an exemption for India. Refiners such as Indian Oil Corp. and Mangalore Refinery & Petrochemicals Ltd. will make payments after the mechanism is officially notified, the people said.

Also, payment into multiple escrow accounts will reduce the risks of Iranian bank accounts being frozen in case the U.S. brings new banks under sanctions, the people said.

India and Iran followed a similar mechanism previously when the U.S. imposed sanctions in 2012. At that time, 45 percent of the dues were paid into escrow accounts in India of Iranian banks and the remaining settled in euros through an overseas bank.

Under the exemptions granted last month, U.S. allowed India to import as much as 300,000 barrels a day of Iranian oil for 180 days. That’s less than Iran’s average daily exports to the nation of about 540,000 barrels this year, and almost 450,000 barrels in 2017, shipping data compiled by Bloomberg show.

Exports to Iran stood at $2.65 billion during the last financial year, including rice, spices, tea, yarn, medicines and various industrial products, according to India’s Directorate General of Commercial Intelligence and Statistics, an arm of Ministry of Commerce and Industry.