# Article 6 — Methods and arrangements for supplying reference data **Commission Delegated Regulation (EU) 2017/585 · binding · OJ L 87, 31.3.2017 · dated 14 Jul 2016 [in force]** *In force · Commission Delegated Regulation (EU) 2017/585, OJ L 87, 31.3.2017 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/eli/reg_del/2017/585/oj/eng)* 1. Trading venues and systematic internalisers shall ensure that they provide complete and accurate reference data to their competent authorities pursuant to Articles 1 and 3. 1. Trading venues and systematic internalisers shall put methods and arrangements in place that enable them to identify incomplete or inaccurate reference data previously submitted. A trading venue or systematic internaliser detecting that submitted reference data is incomplete or inaccurate shall promptly notify its competent authority and transmit to the competent authority complete and correct relevant reference data without undue delay.