Article 21
1. The appropriations shall be classified by chapter and article. 2. The appropriations entered under a chapter of expenditure may not be used for the purposes of any other chapter of expenditure. 3. However, the Management Board may propose to the Commission that appropriations be transferred from one chapter to another. The Commission shall act within one month. If it has not so acted, the transfers shall be deemed to be approved. The Management Board or, by delegation, the Director of the Centre may authorize transfers between articles on behalf of the Centre. The Commission shall be informed of such transfers. 4. Every proposal for a transfer within a chapter or between chapters shall be subject to the approval of the Financial Controller who shall attest that the appropriations are available. 5. This Article shall apply to the appropriations for revenue allocated for a specific purpose within the meaning of Article 3 (2) only as long as that revenue is not used for any other purpose.