# Article 90 — Determination of the substantial importance of the operations of a trading venue in a host Member State (Article 79(2) of Directive 2014/65/EU) **Commission Delegated Regulation (EU) 2017/565 · binding · OJ L 87, 31.3.2017 · dated 25 Apr 2016 [in force]** *In force · Consolidated version of 2 August 2022 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:02017R0565-20220802)* 1. The operations of a regulated market in a host Member State shall be considered to be of substantial importance for the functioning of the securities markets and the protection of investors in that host Member State where at least one of the following criteria is met: **(a)** the host Member State has formerly been the home Member State of the regulated market in question; **(b)** the regulated market in question has acquired through merger, takeover, or any other form of transfer of the whole or part of the business of a regulated market which was previously operated by a market operator which had its registered office or head office in the host Member State. 2. The operations of an MTF or OTF in a host Member State shall be considered to be of substantial importance for the functioning of the securities markets and the protection of investors in that host Member State where at least one of the criteria laid down in paragraph 1 is met in regard to that MTF or OTF and at least one of the following additional criteria is met: **(a)** before one of the situations set out in paragraph 1 occurred in regard to the MTF or OTF, the trading venue had a market share of at least 10 % of trading in terms of total turnover in monetary terms in on-venue trading and systematic internaliser trading in the host Member State in at least one asset class subject to the transparency obligations of Regulation (EU) No 600/2014; **(b)** the MTF or OTF is registered as an SME growth market. **CHAPTER VIII — FINAL PROVISIONS**