Commission Delegated Regulation (EU) 2017/573 of 6 June 2016 supplementing Directive 2014/65/EU of the European Parliament and of the Council on markets in financial instruments with regard to regulatory technical standards on requirements to ensure fair and non-discriminatory co-location services and fee structures

RTS 10 on fair and non-discriminatory co-location services and fee structures at trading venues: venues may set their own co-location policy on objective, transparent criteria (including for third-party data centres), must publish their co-location and fee terms, and must not use fee structures that encourage disorderly trading; volume discounts are allowed only where the reduced fee applies to trades after the threshold is reached.