Where the Business Case for any future light rail project is based upon an assumption that, prior to the award of the contract for the construction of the infrastructure, certain matters will have been completed (e.g. design, the obtaining of all necessary approvals and consents or the diversion of utilities), the contract negotiations should be delayed until completion of these matters has been achieved, failing which before any infrastructure contract is signed a new Business Case should be prepared on the basis of the altered assumptions that prevail and should be approved by the promoter and owner of the project.