The crown would ultimately still be required to prove its case beyond a reasonable doubt. The offence covers possession, and if they can prove the possession beyond a reasonable doubt.... The reasonable inference that the information is intended to be used eases the burden on the crown somewhat, and at some point may shift the burden of adducing evidence to the accused, but ultimately the trier of fact will still have to be satisfied of all of the required elements of the offence. This is simply a matter of, at a certain point, shifting a certain evidentiary burden to the accused, and it is used in other sections of the code and has been upheld by the courts.
On March 11th, 2008. See this statement in context.