Membership is available to persons who live, work, worship, or attend school in Butler, Chase, Douglas, Franklin, Geary, Greenwood, Jackson, Jefferson, Leavenworth, Lyon, Marion, Morris, Osage, Pottawatomie, Riley, Shawnee, Wabaunsee, Woodson, Wyandotte, Stafford, Pratt, Kingman, Reno, Rice, McPherson, Harvey, or Sedgwick Counties in Kansas, or Platte County in Missouri. Spouses of deceased members, employees, retirees from eligible employers, and their immediate family or household members are also eligible. Members of qualifying organizations and groups may join. Once established, membership continues for life even if the member moves or changes jobs.