Paragraph 18
In this Schedule—
“audit” means systematic assessment of the adequacy of the management system to achieve the purpose referred to in paragraph 7 carried out by persons who are sufficiently independent of the system (but who may be employed by the duty holder) to ensure that such assessment is objective;
“management system” means the organisation and arrangements established by the duty holder for managing his undertaking;
any reference to an operation intended to be undertaken by a duty holder is—
where the safety case is prepared pursuant to regulation 3, a reference to the operations he intends to carry out in relation to the railway infrastructure concerned;
where the safety case is prepared pursuant to regulation 4 or 5, a reference to the train or station operations concerned.