It is my understanding that the Cultural Property Export and Import Act contains regulations under which cultural property must be 50 years old or over, and that there is a sort of a 90-day waiting period during which an attempt is made to find people who would be prepared to buy the significant cultural property in question.
I also think that the $3,000 maximum is unrealistic. The 90-day period might be logical, but I think that amending the requirement that the property be at least 50 years old would perhaps be the best way to achieve what you're trying to accomplish through Bill C-473.