The Government of Canada and the GNWT actually drafted an addendum and release agreements to reflect the transfer of responsibility from Canada to the GNWT. These agreements were not signed prior to devolution because the Aboriginal parties did not support having Canada removed as a signatory to the environmental agreements.
Robert C. McLeod on Question 669-18(2): Diamond Mine Environmental Agreements
In the Legislative Assembly on March 2nd, 2017. See this statement in context.
Question 669-18(2): Diamond Mine Environmental Agreements
Oral Questions
March 1st, 2017
See context to find out what was said next.