“The National Oceanic and Atmospheric Administration (NOAA) and the National Park Service (NPS) signed a Memorandum of Understanding (MOU) with Cuba’s Ministry of Science, Technology, and Environment (CITMA). The MOU aims to facilitate joint efforts concerning science, stewardship, and management regarding Marine Protected Areas (MPAs).”
Check it out for more detail.
Presumably, the Coast Guard will have some role in enforcing restrictions on operations in these areas. Apparently the CG has had good long term relations with their Cuban counterparts.
Chuck Hill's CG Blog 