westbank reserves were once part of the okanagan indian band until they separated and became an independent band in 1963. 27 years later, in 1990, a framework agreement was entered into which allowed community-based self-government to be negotiated. on may 6, 2004, the westbank first nation self-government act (bill c-11) received royal assent and became law. wfn self-government officially came into force april 1, 2005.