Due to varying international regulations, this version of the Astro is approved for use only in the United States. The sale and unlicensed use of the Garmin Astro GPS Dog Tracking System in any form is presently prohibited by the Canadian government. According to a document published by Industry Canada dated June 2009, the MURS radio frequency used by the Astro will be permitted to be sold and operated on a license-free basis at the end of a five-year transition period (June 2014). This Industry Canada ruling may be found in its entirety at http://www.ic.gc.ca/eic/site/smt-gst.nsf/eng/sf09543.html. Parties interested in the implementation of this spectrum utilization policy or with questions should contact their local Industry Canada office.