28.9.83 Official Journal of the European Communities No L 266/1 (Acts whose publication is obligatory) COMMISSION REGULATION (EEC) No 2681/83 of 21 September 1983 laying down detailed rules for the application of the subsidy system for oil seeds THE COMMISSION OF THE EUROPEAN COMMUNITIES, Having regard to the Treaty establishing the European Economic Community, ' Having regard to Council Regulation No 136/66/EEC of 22 September 1966 on the establishment of a common organization of the market in oils and fats ('), as last amended by Regulation (EEC) No 1413/82 (2), and in particular Article 27 (5) thereof, Whereas Article 2 of Council Regulation (EEC) No 1594/83 of 14 June 1983 on the subsidy for oil seeds (3) provides that Member States shall control the use of such seeds at the oil mill or at the feed mill; whereas, in order to ensure effective control, rules for such control must be adopted; Whereas the stock account of the seed users should be used as a basis for this control; Whereas Article 4 of Regulation (EEC) No 1594/83 provides for the introduction of a Community subsidy certificate which is valid, where the subsidy is fixed in advance, throughout the Community; whereas the entry into force of these rules required the adoption of common provisions on the drawing-up and use of these (1) OJ No 172, 30. 9. 1966, p. 3025/66. (2) OJ No L 162, 12. 6. 1982, p. 6. (3) O] No L 163, 22. 6. 1983, p. 44. certificates, on the introduction of Community forms and on the setting-up of methods of administrative collaboration between Member States; Whereas, where the subsidy is fixed in advance, the period of validity of the certificate must be determined with due regard to the need to adopt the conditions for buying in seeds harvested in the Community to those on the world market; Whereas, having regard to practice in the seed trade, a certain tolerance should be allowed in respect of the quantity identified in comparison with that specified in the certificate;’ :  Whereas Article 5 of Regulation (EEC) No 1594/83 makes the issue of the certificate subject, where the subsidy is fixed in advance, to the lodging of a deposit which, except in cases of force majeure, is forfeited if the seeds are not placed under control at an oil mill or at a seed mill located in the Community during the . period of validity of the certificate; whereas, to that _end, the deposit system should be defined by fixing the amount of the deposit and the conditions for its release; : Whereas, in the interests of efficient administration, the certificates and extracts of certificates may not be amended after they have been issued; whereas, however, for cases of doubt involving an error attributable to the issuing authority and concerning the details shown on thé certificate or extract, there should be a procedure for the withdrawal of incorrect certificates or extracts and the issue of corrected documents;