Tarislar gets a nice write-up on p. 126 of Seattle 2072 and on p. 66 of Emerald Shadows from the Seattle Box Set, if you have it.
Tarislar is officially abandoned by the metroplex government, meaning there are no municipal services, but the community has pulled together to provide sanitation, water, power, food, and a Knight-Errant contract (as Crimsondude notes). The Ancients and Laésa are dangerous, especially to each other, but also provide a measure of order and stability and protection from outsiders.