Commission Regulation (EEC) No 1707/93 of 30 June 1993 amending Regulations (EEC) No 131/92, (EEC) No 1695/92 and (EEC) No 1696/92 as regards the operative event for the agricultural conversion rate applicable to the specific measures for the supply of products to the French overseas departments, the Canary Islands and the Azores and Madeira