“Given their comparative advantages, regional and subregional bodies have a central role to play in devising tailor-made approaches for implementing each of the UN Strategy’s four pillars among their respective members. The general nature of many of the Strategy’s provisions allows regions and subregions a degree of latitude as they seek to develop implementation plans and programs. They will need to determine how best to implement the Strategy to maximize its impact on the ground. This flexibility is significant because the nature and scope of the terrorist threat vary from region to region. A one-size-fits-all approach to implementation is thus neither effective nor appropriate.”