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On May 28, 2026, South Dakota Governor John Thompson signed into law a bill that amends the state constitution to provide greater protections for Indigenous peoples. The amendment, known as Article XVIII, guarantees the recognition and preservation of the inherent sovereignty of tribes within the state and reaffirms their rights to self-governance, land, and resources.The bill, which was passed by the state legislature earlier this month after extensive debate and consultation with tribal leaders, marks a significant step towards improving the relationship between the state government and South Dakota's Indigenous communities. It comes in response to years of advocacy and activism from Indigenous groups, who have long called for stronger legal protections for their rights and interests.Under the new amendment, the state government is required to consult with tribal representatives on matters that affect their communities, including land use, economic development, and environmental protection. It also guarantees the right of tribes to engage in traditional practices and ceremonies, and prohibits the state from infringing on their sovereignty without their consent.Governor Thompson hailed the passage of the bill as a historic moment for South Dakota, recognizing the importance of respecting and upholding the rights of Indigenous peoples. In a statement, he stated, "Today, we have taken a significant step towards justice and reconciliation by amending our state constitution to better reflect the values and traditions of our Indigenous communities. This amendment signals a new era of partnership and mutual respect between the state government and our tribal nations."The amendment has been warmly welcomed by tribal leaders and advocates, who see it as a long-overdue recognition of the sovereignty and self-determination of Indigenous peoples. Oglala Sioux Tribe President Kevin Killer expressed his gratitude for the bill's passage, stating, "This amendment represents a crucial affirmation of our rights as tribal nations and will help us to protect our lands, cultures, and way of life for future generations."Overall, the amendment to the South Dakota constitution represents a significant milestone in the ongoing efforts to promote Indigenous rights and advance reconciliation between the state government and tribal communities. It serves as a testament to the power of advocacy and grassroots activism in effecting positive change in constitutional law.