Commission Regulation (EC) No 1270/97 of 1 July 1997 establishing the forecast supply balance for the Azores and Madeira for the period 1 July to 31 December 1997 and the Canary Islands for the period 1 July 1997 to 30 June 1998 with regard to sugar, provided by Council Regulations (EEC) No 1600/92 and (EEC) No 1601/92