FLUX, which stands for Fisheries Language for Universal Exchange, is a UN standard for data sharing in fisheries. It is designed to enable the efficient exchange of fisheries data between stakeholders, with the primary objective of detecting and deterring Illegal, Unregulated, and Unreported (IUU) fishing. The implementation of FLUX is a complex process due to its comprehensive nature. Each FLUX message needs to be verified and standardized against hundreds of business rules within its specific data domains. The core domains of data in FLUX include Vessel, Vessel positions, Fishing Activity, Fishing Licences, Authorizations, and Permits (FLAP), Accumulated Catch Data Reports (ACDR), Master Data Management, and Sales. These domains collectively provide a holistic representation of the fishing activity, adding depth and detail to the data exchanged. In the context of Vessel Monitoring Systems (VMS), integrating FLUX standards into the Fishing Monitoring Centre (FMC) software enhances data sharing capabilities and improves interoperability. This contributes significantly to the effectiveness of fisheries management and promotes greater transparency and compliance.