2. SPVs may also claim a separate fee or margin for accepting performance risk on the change and accepting an interface risk between the implementation of the change and the provision of the existing service. The MOD will also need to consider whether markups for performance risk and interface risks are justified. It is unlikely that low value or medium value changes will justify this type of mark-up and where these are asked for on high value changes, SPVs should demonstrate why these mark-ups are justified and where they were agreed to in the procurement. The % should be no higher than the original SPV cost %.