++++ 1 . Agriculture - Common organization of the markets - Cereals - Additional co-responsibility levy - Objective - Levy not in nature of a fiscal charge - Provisional collection subject to possible reimbursement subsequently - Principle of proportionality - Not infringed ( Regulation No 2727/75 of the Council, as amended by Regulation No 1097/88, Article 4b; Commission Regulation No 1432/88 ) 2 . Community law - Principles - Proportionality - Measures imposing financial charges - Whether proportionate - Criteria for assessment - Community legislature' s discretion in relation to the common agricultural policy - Review by the Court - Limits ( EEC Treaty, Arts 40 and 43 )