23That interpretation is supported by the finding that limiting the scope of ‘denied boarding’ exclusively to cases of overbooking would have the practical effect of substantially reducing the protection afforded to passengers under Regulation No 261/2004 and would therefore be contrary to the aim of that regulation - referred to in recital 1 in the preamble thereto - of ensuring a high level of protection for passengers. Consequently, a broad interpretation of the rights granted to passengers is justified (see, to that effect, Case C-344/04 IATA and ELFAA [2006] ECR I-403, paragraph 69, and C-549/07 Wallentin-Hermann [2008] ECR I-11061, paragraph 18).
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