CSKT set to take over management of National Bison Range Management of the National Bison Range at the southern end of the Mission Valley has been a point for debate since the early 2000s. By: Dennis Bragg and last updated 2020-12-28 12:00:22-05 President Donald Trumpâs decision to sign the COVID-19 stimulus bill, which also had a funding bill attached, has wide ramifications. It makes the Montana Water Protection Act law, which in turn gives the management of the National Bison Range to the Confederated Salish and Kootenai Tribes. Since the early 2000s, management of the National Bison Range at the southern end of the Mission Valley has been a point for debate.