Taking 'Goods To Follow' back out of Canada

[chrisf]

As a Permanent Resident, if i take my household contents ie 'Goods to Follow' out of Canada once they have already been admitted by Customs into Canada, and then take them back out again, how can i get them back again at a later date without paying any duties? I'm assuming i can notify the authorities that i'm taking them out but i don't know how to about it?