Sch 3 para 4
(1) An infrastructure manager's average and marginal charges for equivalent uses of the railway infrastructure must be comparable, and comparable services in the same market segment must be subject to the same charges. (2) The network statement produced by the infrastructure manager in accordance with regulation 13 must demonstrate that the charging system meets the requirements in sub-paragraph (1) in so far as this can be done without the disclosure of commercially confidential information.