29 Article 345 TFEU is an expression of the principle of the neutrality of the Treaties in relation to the rules in Member States governing the system of property ownership.This finding of the CJEU effectively subjects the principle of neutrality of ownership to a proportionality test and, generally, seems to restrict its scope--actually, it seems to me that the Essent Judgment makes Article 345 TFEU less than neutral in that it imposes a justification burden on the ownership systems designed at Member State level.
30 In that regard, it is apparent from the Court’s case-law that the Treaties do not preclude, as a general rule, either the nationalisation of undertakings (see, to that effect, Case 6/64 Costa  ECR 585, at 598) or their privatisation (see, to that effect, Case C‑244/11 Commission v Greece  ECR I‑0000, paragraph 17).
31 It follows that Member States may legitimately pursue an objective of establishing or maintaining a body of rules relating to the public ownership of certain undertakings.
32 […] the prohibition of privatisation, within the meaning of the national legislation at issue in the main proceedings, allows, in essence, the transfer of shares held in a distribution system operator only to the authorities and to legal persons owned, directly or indirectly, by those authorities, since any transfer which has the result that the shares become the property of persons other than such authorities and legal persons is prohibited.
33 It follows that the prohibition of privatisation precludes ownership by any private individual of shares in an electricity or gas distribution system operator active in the Netherlands. Its objective is therefore to maintain a body of rules relating to public ownership in respect of those operators.
34 Such a prohibition falls within the scope of Article 345 TFEU. […]36 However, Article 345 TFEU does not mean that rules governing the system of property ownership current in the Member States are not subject to the fundamental rules of the FEU Treaty, which rules include, inter alia, the prohibition of discrimination, freedom of establishment and the free movement of capital (see, to that effect, Case 182/83 Fearon  ECR 3677, paragraph 7; Case C‑302/97 Konle  ECR I‑3099, paragraph 38; Case C‑452/01 Ospelt and Schlössle Weissenberg  ECR I‑9743, paragraph 24; Case C‑171/08 Commission v Portugal  ECR I‑6817, paragraph 64; Case C‑271/09 Commission v Poland  ECR I‑0000, paragraph 44; and Commission v Greece, paragraph 16).
37 Consequently, the fact that the Kingdom of the Netherlands has established, in the sector of electricity or gas distribution system operators active in its territory, a body of rules relating to public ownership covered by Article 345 TFEU does not mean that that Member State is free to disregard, in that sector, the rules relating to the free movement of capital (see, by analogy, Commission v Poland, paragraph 44 and the case‑law cited).
38 Accordingly, the prohibition of privatisation falls within the scope of Article 63 TFEU and must be examined in the light of that article […] (C-105/12 ti C-107/12 at paras 29-38, emphasis added).
This may be an opening door for a stricter control of ownership rules in the Member States and, once more, for an implicit redistribution of competences between the EU and the Member States [see the interesting discussion by F Losada Fraga et al, 'Property and European Integration: Dimensions of Article 345 TFEU' (2012) Helsinki Legal Studies Research Paper No. 17]. However, more clarification will be necessary, particularly in cases where the public interest justifications for restrictions of (private) ownership are less clear cut than in the Essent case and that, consequently, will be likely to result in an effective restriction of domestic rules on (public) ownership.