Most important issue is that BCFN are untreated, unconquered and unceded nations as far as BCFN are concerned and it's the same for UNDRIP.

http://www.bctreaty.ca
http://www.un.org/esa/socdev/unpfii/documents/DRIPS_en.pdf

Basically out of about 205 BCFN there are only about 5 that have been treated out. The BCFN that have not been treated out can either settle treaties with the BC government or have it settled in the SCOC where the government has lost and will continue to lose or have the World Courts settle the dispute. Note the World Courts will uphold the UNDRIP and that is why BC Liberals and Canada are scared to move ahead UNDRIP

The downfall of BC and Canada besides ignoring the facts ( BCFN are untreated, unconquered and unceded nations) is not moving ahead with UNDRIP is that taxpayers pay billions for status quo, hundreds of millions  in legal fees, reinburse BCFN legal fees when they win and pay settlements along with rights and titles to traditional territories.