# Article 2 — Identification of the relevant parties **Commission Delegated Regulation (EU) 2017/580 · binding · OJ L 87, 31.3.2017 · dated 24 Jun 2016 [in force]** *In force · Commission Delegated Regulation (EU) 2017/580, OJ L 87, 31.3.2017 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/eli/reg_del/2017/580/oj/eng)* 1. For all orders, operators of trading venues shall maintain the records on the following: **(a)** the member or participant of the trading venue who submitted the order to the trading venue, identified as specified in field 1 of Table 2 of the Annex; **(b)** the person or computer algorithm within the member or participant of the trading venue to which an order is submitted that is responsible for the investment decision in relation to the order, identified as specified in field 4 of the Table 2 of the Annex; **(c)** the person or computer algorithm within the member or participant of the trading venue that is responsible for the execution of the order, identified as specified in field 5 of Table 2 of the Annex; **(d)** the member or participant of the trading venue who routed the order on behalf of and in the name of another member or participant of the trading venue, identified as a non-executing broker as specified in field 6 of Table 2 of the Annex; **(e)** the client on whose behalf the member or participant of the trading venue submitted the order to the trading venue, identified as specified in field 3 of Table 2 of the Annex. 1. Where a member or participant or client of the trading venue is authorised under the legislation of a Member State to allocate an order to its client following submission of the order to the trading venue and has not yet allocated the order to its client at the time of the submission of the order, that order shall be identified as specified in field 3 of Table 2 of the Annex. 1. Where several orders are submitted to the trading venue together as an aggregated order, the aggregated order shall be identified as specified in field 3 of Table 2 of the Annex.