Article 4
Member States' obligations 1. The Member States shall be responsible for tracking and verifying, in accordance with this Regulation, tuna caught, transported and unloaded for processing on their territory. 2. The obligation in paragraph 1 shall also apply to tuna unloaded outside the Agreement area by vessels operating in that area. In the case of those vessels, the tracking system shall involve confirmation of the weight unloaded. 3. The AIDCP secretariat shall issue the tuna tracking forms to the on-board observers, except where the Member State having jurisdiction over the vessel has a national observers' programme in operation. In such cases, Member States shall provide the on-board observer with tracking forms for each of the vessels flying their flag and authorised to fish for tuna in the Agreement area. 4. Member States shall take the necessary measures to ensure that the tuna caught in the Agreement area, which is stored, processed or marketed in their territory be clearly identified, until the time it is ready for retail sale, as the case may be, as dolphin-safe tuna or non-dolphin-safe tuna. These procedures shall include the following requirements, namely that: (a) any change in ownership of unprocessed tuna covered by a tracking form number shall be dealt with in accordance with Article 6(4), (5) and (7); (b) during processing, dolphin-safe and non-dolphin safe tuna shall not be processed on the same production line at the same time; (c) processors shall maintain records which are sufficiently clear to permit the lot numbers of processed tuna to be traced back to the corresponding tracking form number.