++++ 1 . Competition - Administrative procedure - Request for information - Powers of the Commission ( Council Regulation No 17, Arts 11 and 14 ) 2 . Community law - Principles - Rights of the defence - Observance in administrative procedures - Competition - Decision requesting information addressed to an undertaking - Right to refuse to provide an answer implying recognition of the existence of an infringement ( Council Regulation No 17, Art . 11 )