1. Agriculture ° Common organization of the markets ° Sugar ° Offsetting of storage costs ° Levy imposed on manufacturers ° Materialization of the obligation to pay the levy ° Disposal of the sugar (Council Regulations No 1358/77, Art. 6(4), and No 1785/81, Art. 8(2), third subpara. (a)) 2. Agriculture ° Common organization of the markets ° Sugar ° Basic production levy ° Additional levy on the B quota ° Materialization of the obligation to pay the levies ° End of each marketing year (Council Regulation No 1785/81, Art. 28(3) and (4)) 3. Agriculture ° Common organization of the markets ° Sugar ° Elimination levy ° Materialization of the obligation to pay the levy ° End of each of the marketing years from 1986/87 to 1990/91 (Council Regulation No 1785/81, Art. 32a(1), as amended by Regulation No 934/86; Commission Regulation No 3046/86, Art. 1(1)) 4. Agriculture ° Common organization of the markets ° Sugar ° Special elimination levy ° Materialization of the obligation to pay the levy ° End of the 1986/87 marketing year (Council Regulation No 1914/87, Art. 1; Commission Regulation No 3061/87, Arts 1 and 2)