Because the business record-keeping requirements that are also introduced in Bill C-71 would obligate businesses to record their first point of sale. The first point of sale, presumably, in the example I'm giving, would lead to you as the person who acquired that firearm from a vendor in Manitoba, for example.
You would then be able to say that you are the current owner of that firearm or to suggest that you transferred the firearm to somebody and in doing so verified their licence with the registrar of firearms. You would be able to have it confirmed by the existence of a reference number attached to your licence, indicating that, yes, you indeed did verify the licence at that period of time. Then it would allow the chain of custody to continue to the other person attached to that reference number, namely, presumably, the buyer of that firearm.