(3)Regulation (EU) 2024/791 amended Regulation (EU) No 600/2014 by inserting into Article 9(5) of that Regulation a new point (f). Pursuant to that provision, the Commission is empowered to specify the characteristics of ‘central limit order books’ (‘CLOBs’) and ‘periodic auction trading systems’. It is therefore necessary to introduce definitions to that effect into Delegated Regulation (EU) 2017/583. A trading system operated by means of an order book that only includes market maker quotes, and a trading algorithm that matches incoming buy and sell orders with resting market maker quotes without human intervention on the basis of the best available price on a continuous basis should be considered as a continuous order book trading system. A trading system operated by means of an order book, where the quotes of the liquidity providers are confirmed before the potential execution of an incoming order, and a trading algorithm that matches incoming buy and sell orders with the confirmed quotes of the liquidity providers without human intervention on the basis of the best available price on a continuous basis, should also be considered as a continuous order book trading system. Where a CLOB trading system combines elements of a continuous order book trading system and of a periodic auction trading system, the continuous order book component and the periodic auction component of the CLOB trading system should be subject to the information requirements set out in Annex I to Delegated Regulation (EU) 2017/583 for continuous order book trading systems and periodic auction trading systems respectively.