# ANNEX IV **Commission Delegated Regulation (EU) 2025/1155 · binding · OJ L, 2025/1155, 3.11.2025 · dated 12 Jun 2025 [in force]** *In force · Commission Delegated Regulation (EU) 2025/1155, OJ L, 2025/1155, 3.11.2025 · Checked against EUR-Lex on 26 Oct 2026 · [Official source](https://eur-lex.europa.eu/eli/reg_del/2025/1155/oj/eng)* Level of accuracy of business clocks Table 1 Level of accuracy for operators of trading venues and systematic internalisers | Gateway-to-gateway latency time of the trading system | Maximum divergence from UTC | Granularity of the timestamp | |---|---|---| | > 1 millisecond | 1 millisecond | 1 millisecond or better | | ≤ 1 millisecond | 100 microseconds | Increase granularity to 0,1 microseconds or better | Table 2 Level of accuracy for members, participants or users of a trading venue | Type of trading activity | Description | Maximum divergence from UTC | Granularity of the timestamp | |---|---|---|---| | Activity using high frequency algorithmic trading technique | High frequency algorithmic trading technique. | 100 microseconds | 0,1 microseconds or better | | Activity on voice trading systems | Voice trading systems as defined in Table 2 of Annex II to Delegated Regulation (EU) 2017/583. | 1 second | 1 second or better | | Activity on request for quote systems where the response requires human intervention or where the system does not allow algorithmic trading | Request for quotes systems as defined in Table 2 of Annex II to Delegated Regulation (EU) 2017/583. | 1 second | 1 second or better | | Activity of concluding negotiated transactions | Negotiated transaction as set out in Article 4(1)(b) of Regulation (EU) No 600/2014. | 1 second | 1 second or better |