The Independent Reviewer role under the LIPD includes a general oversight and checking of the Development Activities throughout the Development Phase. In contrast under the SIPD, this function is retained by the State. On the Social Infrastructure Availability PPP Projects the State typically carries out the Functions at the Maintained Asset once it is completed. To avoid a situation where issues as to whether the Maintained Asset will meet the State's functional requirements are only discovered late in construction (when they are difficult and expensive to address), the State has a more active oversight and checking role during the Development Phase.