This paper examines the ontological politics of an encounter between proposed energy pipelines and Indigenous peoples. The Enbridge Corporation has applied to construct a pipeline system to deliver diluted bitumen from the Alberta tar sands to the Pacific coast of British Columbia, but the Carrier Sekani Tribal Council and their member communities have asserted the authority to prevent this project from passing through their unceded territories. Studying Carrier Sekani contestation of Canadian regulatory assessment of the Enbridge Northern Gateway Project, we examine how the processes of Indigenous becoming exceed notions of Indigenous being that are included in the permitting process as traditional knowledge. We focus both on the performance of legal obligations to consider Aboriginal traditional knowledge and the emerging politics of Carrier Sekani resistance. Our intention is not to question the integrity of traditional knowledge that the regulatory process incorporates, but to highlight how traditional knowledge functions as an anchor for a field of governmental inquiry and action. Providing a historical and geographical context of Carrier Sekani relations with development and the state, we argue that the coding of Indigenous being as traditional works to disavow contemporary processes of Indigenous becoming that are surplus to the spatial ontology of capitalist energy development for global markets. Against efforts to sanction development on disputed territory through formal recognition of a constrained Indigeneity, Carrier Sekani people assert the sovereign authority to prevent or permit development on their lands and waterways using traditional governance systems. Broadly, this paper suggests that recognizing the ontological politics at stake in this permitting process provides a useful opening to understand continued colonial captures at work in the inclusion of traditional knowledge in environmental governance. But it also demonstrates the capacity of Indigenous resistance to these enclosures to challenge and reshape global geographies of energy, capitalism, and climate. [ABSTRACT FROM PUBLISHER]