The assessment of risk at each stage mentioned in Recommendation 6 should be the subject of a peer review by external consultants with experience of similar large-scale infrastructure projects in the transportation sector who should submit a report of each review to the promoter and owner of the project as well as to the procurement and project manager sufficiently far in advance of the signature of the infrastructure contract to enable the promoter and owner to consider whether to authorise its signature and, as appropriate, to consider any other available options requiring a strategic decision.