Where the Change process in a contract allows mark-ups, management fees and the like to be charged by Project Co as part of the variation, an Authority should take active steps to ensure that such add-ons are reasonable and commensurate with the value of the change being proposed. Individual contracts should be checked in order to ascertain if there is any limitation on fees and other associated costs which could legitimately be charged by Project Co. For example, as noted above, in the Low Value Change category of the NPD/hub contracts, no management fees relating to changes are permissible. An Authority should also check if any scheduled update of the financial model is due, in which case the cost of that should not be added to the costs of the Change process.