4.16 The contract realignment confirms SBS's obligations to deliver outstanding elements of the contract to an adjusted milestone plan. For example, the single customer view, a unique view of all the NS&I product holdings of each customer, was an implied requirement of NS&I. But as the contract was not specific SBS could have avoided the obligation to deliver. NS&I has confirmed and agreed the single customer view obligation with SBS, but the scope and detail of this is still being discussed.