For more details you can reference these FAQs from the U.S. Department of The Treasury, which explain that travel-related transactions are allowed for the following purposes: “family visits; official business of the U.S. government, foreign governments, and certain intergovernmental organizations; journalistic activity; professional research and professional meetings; educational activities; religious activities; public performances, clinics, workshops, athletic and other competitions, and exhibitions; support for the Cuban people; humanitarian projects; activities of private foundations or research or educational institutes; exportation, importation, or transmission of information or information materials; and certain authorized export transactions.”
