Maybe, starting September 1, 2010 First Nations status card holders have been be exempt from the provincial part of the HST for eligible off-reserve purchases.
Please visit: www.fin.gov.on.ca/en/tax/hst/whatstaxable.html to see which off-reserve purchases are exempt. The selling department should use tax code ‘R3’ to record any qualifying sales and is required to take a copy (front and back) of the Status Indian Card which should be retained as part of the supporting documentation. For more information, please refer to GST/HST Information Bulletin B-039R3 on the CRA website: http://www.cra-arc.gc.ca/E/pub/gm/b-039/README.html and the Ontario First Nations Point of Sale Exemptions.