The Osage Nation Congress expressly and generally reserves for itself, the Osage Nation, the Osage Nation Tax Commission and individual members and employees of the Osage Nation Congress and the Osage Nation Tax Commission and individual employees of the Osage government, when acting within the scope of their official duties, all rights of sovereign immunity against lawsuits of every kind and nature, unless expressly waived by action of the Osage Nation Congress. ONCA 11-41, eff. Apr. 12, 2011.