The Co-op Act(s)
Depending on what type of co-operative your organization will be and whether you plan to incorporate provincially or federally, there are different Co-op and Credit Union Acts:
The Saskatchewan Co-operatives Act, 1996: http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/C37-3.pdf
The Canadian Co-operatives Act, 1998: http://laws.justice.gc.ca/en/C-1.7/index.html
The New Generation Co-operatives Act: http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/N4-001.pdf
The Credit Union Act, 1998: http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/C45-2.pdf