New US regulations targeting Cuba introduce restrictions ranging from professional events and educational travel in the country to financial transactions.
Persons subject to US jurisdiction will not be allowed to organize or attend professional meetings or conferences in Cuba.
Sponsor requirement for educational travel
People traveling to Cuba for educational purposes will be required to make their trips under the sponsorship of an organization subject to US jurisdiction. Exceptions will apply to accredited US undergraduate or graduate educational institutions, their students and full-time permanent employees conducting certain educational activities.

Under the regulation, nearly all passengers traveling to Cuba for educational purposes will have to travel with a representative of the sponsoring organization. Previously authorized group people-to-people educational travel will no longer be permitted.

Plans of people who initiated travel arrangements, such as purchasing airline tickets, before September 30 may remain covered by the authorization.
Ban on Cuba-related financial transactions
Direct or indirect financial transactions with entities on the Cuba Restricted List, which includes organizations linked to the Cuban military and security forces, have been banned.

Authorization for banking institutions to process “U-turn” transactions in which Cuba or a Cuban national has a beneficial interest, and which begin and end outside the US, has also been revoked. Banks may directly reject these transactions instead of blocking them.
In addition, banks have been prohibited from opening or maintaining accounts for Cuban nationals who are independent private-sector entrepreneurs.