31 CFR §515.566

1. (a)General license. Persons subject to U.S. jurisdiction, including religious organizations located in the United States and members and staff of such organizations, are authorized to engage in the travel-related transactions set forth in § 515.560(c) and such additional transactions as are directly incident to engaging in religious activities in Cuba, provided that the travel-related transactions pursuant to this authorization must be for the purpose of engaging, while in Cuba, in a full-time schedule of religious activities. Nothing in this paragraph authorizes a direct financial transaction prohibited by § 515.209, or the lodging, paying for lodging, or making any reservation for or on behalf of a third party to lodge, at any property on the Cuba Prohibited Accommodations List to the extent prohibited by § 515.210.
2. (b)Financial and material donations to Cuba or Cuban nationals are not authorized by this section.
3. (c)Specific licenses. Specific licenses may be issued on a case-by-case basis authorizing the travel-related transactions set forth in § 515.560(c) and such other transactions as are related to religious activities that do not qualify for the general license under paragraph (a) of this section.