1. Nuclear materials subject to particular safeguard obligations entered into by the Community in an agreement concluded with a third country or an international organisation shall be identified with the appropriate obligation code, as communicated by the Commission, in the following notifications and records:
initial book inventory provided for in Article 13;
inventory change reports, including ending book inventories, provided for in Article 14;
material balance reports and physical inventory listings provided for in Article 15;
intended exports and imports provided for in Articles 23 and 24;
accounting records provided for in Article 11, first paragraph, points (a) and (c).
Unless specifically prohibited in any of those agreements with a third country or an international organisation, the identification of nuclear materials referred to in the first subparagraph shall not preclude the physical mixing of nuclear materials.
2. Where applicable, the attribution of obligation codes in the records provided for in Article 11 and in the reports provided for in Articles 14 and 15 shall comply with the proportionality principle.
3. Paragraph 1 shall not apply to any agreement concluded by the Community and the Member States with the International Atomic Energy Agency.