What comprises a local chapter of an organization?

The local chapter of an organization, obviously is part of a national or international group of people who comply to the same guidelines, mission, and purpose. The local chapter is obliged to meet certain standards and criteria. The local chapter would be comprised of a set of officers or directors, and at-large members from in and around their geographic area who share the common interest of the national or international mother organziation. Local chapters would meet on a regular basis to promote the goals of the organization or hold sessions or event with relevant topics.