Since the introduction of the Multi Annual Capital Investment Framework in 2004, it has been the practice to have an unallocated reserve (Exchequer and PPP) over the period. This reserve is necessary to allow for flexibility over the period whereby an unallocated amount is available for allocation in future years in the light of evolving priorities. The seven year capital envelope included in the National Development Plan continues existing practice and, accordingly, provides for a total reserve of some €5 billion over the period of which €2.8 billion is for PPPs.