This paper provides an overview of all active IOTC Conservation and Management Measures (CMMs) related to data collection and reporting, summarising the current obligations of CPCs under each Resolution and the associated IOTC data reporting forms. It also reviews terminology issues, data resolution requirements, and reporting standards across fisheries and taxa. By consolidating this information, the paper aims to inform participants of WPDCS21 about the most recent updates to data-related CMMs and to highlight areas where further improvements may be required.