Sharing is part of the Iñupiat values system and was built into the Alaska Native Claims Settlement Act (ANCSA) through the 7(i) and 7(j) provisions.
These provisions require regional corporations to share 70 percent of their natural resource revenues with other regional corporations. NANA does this after certain deductions related to operating the mine. The 7(j) provision governs how those shared resource revenues are distributed from regional corporations to village corporations.
These provisions mean that all Alaska Native peoples benefit from development on NANA lands. In fact, in 2015, NANA shared $114 million in Red Dog Mine proceeds with the other regions, Kikiktagruk Inupiat Corporation, and at-large shareholders. This money helps other ANCs reach their goals, uplifting all Alaska Native peoples.
The text of these important components of ANCSA is available here.