Court of Justice 22 June 2017, Case C-549/15: Judgment of the Court (Second Chamber) of 22 June 2017 (request for a preliminary ruling from the Förvaltningsrätten i Linköping — Sweden) — E.ON Biofor Sverige AB v Statens energimyndighet (Reference for a preliminary ruling — Promotion of energy from renewable sources — Biofuels for transport — Directive 2009/28/EC — Article 18(1) — ‘Mass balance’ system to ensure that biogas meets the prescribed sustainability criteria — Validity — Articles 34 and 114 TFEU — National rules requiring the mass balance to be achieved within a location with a clear boundary — Practice of the competent national authority to accept that that condition may be satisfied where sustainable biogas is transported using the national gas network — Order of that authority stating that that condition cannot be satisfied where sustainable biogas is imported from other Member States via interconnected national gas networks — Free movement of goods)

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