30That is the case where, inter alia, one or more elements are to be regarded as constituting the principal supply, while other elements are to be regarded, by contrast, as one or more ancillary supplies which share the tax treatment of the principal supply. In particular, a supply must be regarded as ancillary to a principal supply if it does not constitute for customers an end in itself but a means of better enjoying the principal supply (see, to that effect, judgments of 10 March 2011, Bog and Others, C‑497/09, C‑499/09, C‑501/09 and C‑502/09, EU:C:2011:135, paragraph 54, and of 4 March 2021, Frenetikexito, C‑581/19, EU:C:2021:167, paragraph 41).
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