Since the review of 2004-2006 there have been three distinct types of Scout Network structure. The first is a modified version of the original structure and sees the Network centrally run and operated by a County/Area/Region. A second allows for multiple Networks in one County as long as each come together for some shared events each year. In addition to this model Networks can also be run on a District level, with the District team taking the roles of the County team, and there are some Specialist Networks, usually based at an Activity Centre, that focuses around certain activities only.