The exemptions should be exchanged through a VesselService. The details of the exemptions should be contained in a document of type "ExemptionCertificate".
<?xml version="1.0" encoding="UTF-8"?>
<!-- Exchange of exemption -->
<Vessel xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="https://cise.jrc.ec.europa.eu/datamodel/last/xsd/Vessel.xsd" xsi:schemaLocation="http://www.cise.eu/datamodel/v1/entity/document/ https://cise.jrc.ec.europa.eu/datamodel/last/xsd/entity/document/VesselDocument.xsd" xmlns:doc="http://www.cise.eu/datamodel/v1/entity/document/">
<Name>ABERIII</Name>
<!-- document about the exemption attached -->
<DocumentRel>
<Document xsi:type="doc:VesselDocument">
<Metadata><FileMediaType>image/jpeg</FileMediaType></Metadata><!-- the document type attached in base 64 -Nota: the code list needs to be improved-->
<Content><!-- Base 64 binary document -->
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
</Content>
<DocumentType>ExemptionCertificate</DocumentType>
</Document>
</DocumentRel>
<!-- Identification of the vessel -->
<IMONumber>9074729</IMONumber>
<MMSI>232000000</MMSI>
</Vessel>