Exchange of Letters constituting an Agreement between the Kingdom of the Netherlands, on behalf of Aruba, and the United Nations Educational, Scientific and Cultural Organization (UNESCO) concerning the fifteenth session of the Intergovernmental Oceanographic Commission (IOC) Subcommission for the Caribbean and Adjacent Regions IOCARIBE (SC-IOCARIBE-XV) and the Associated Sciences Conference, in Oranjestad, Aruba, from 6 to 10 May 2019.