1999/392/EC: Commission Decision of 31 May 1999 recognising in principle the completeness of the dossiers submitted for detailed examination in view of the possible inclusion of ZA 1296 (mesotrione), Iodosulfuron-methyl-sodium (AEF 115008) Silthiopham (MON 65500) and Gliocladium catenulatum in Annex I to Council Directive 91/414/EEC concerning the placing of plant- protection products on the market (notified under document number C(1999) 1400) (Text with EEA relevance)