Each local area has a "committee", made of one representative from each different group. The names differ regionally but the job remains the same. The Guardians are set in place to protect their region however they see fit. They're elected to sit at the head of that area's "committee", and thusly have a seat on a national Council. Originally the Council was created with the soul purpose of keeping Mortals from knowing anything not-so-normal existed. It's changed over time for the same reasons any form of government has. A Guardians job is depicted by their past lives, predecessors duties, and what their designated area needs. Hope this helps, but if you have any other questions, please refrain from posting them publically.