Council Regulation (EEC) No 577/91 of 4 March 1991 imposes a definitive anti-dumping duty on imports of certain types of electronic microcircuits known as EPROMs (Erasable Programmable Read Only Memories) originating in Japan. In December 1986 the Commission received from the European Electronic Component Manufacturers Association (EECA) evidence concerning dumping of EPROMs and a complaint related to Article 4(1) of Regulation (EEC) No 2423/88. The specific and unusual situation of the EPROM industry, its complexity and the internationalization of production processes are such that the investigation exceeded the normal time period. In conclusion, a definitive anti-dumping duty of 94% of the net free-at-Community-frontier price before duty is imposed on all types of EPROMs including OTPs and those "flash EPROMs" based on EPROM technology. Certain products shall be exempt if produced and exported to the European Communities by specific companies listed in the Regulation.