"Today's announcement takes us one step closer to replacing out-of-date policies that were not working and puts in place a policy that helps promote political and economic freedom for the Cuban people," Treasury Secretary Jacob Lew said today.
While a US trade embargo remains in effect, the rule changes will ease restrictions on travel, raise a limit on remittances, allow US banks to establish accounts in Cuban banks, facilitate telecommunications services with the island and allow exports of communications devices and supporting services.
US President Barack Obama and Cuba's President Raul Castro announced the historic agreement on December 17, opening the way for a reconciliation after more than 50 years of hostile relations.
Today's announcement came just days after the State Department said Cuba had freed 53 prisoners, making good on a pledge to Washington.
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The changes go into effect tomorrow when they are published in the Federal Register, the government said.
"Cuba has real potential for economic growth and by increasing travel, commerce, communications, and private business development between the United States and Cuba, the United States can help the Cuban people determine their own future," he said.