Transferring A Used Boat In Ontario I Live In SYDNEY, AUSTRALIA And Am Planning On Buying A Used 15 Foot Fiberglass Runabout Tomorrow.?

I live in SYDNEY, AUSTRALIA and am planning on buying a used 15 foot fiberglass runabout tomorrow.? - transferring a used boat in ontario

I have and I'm happy with the boat, but I wonder why I do the paperwork, namely the rational transfer Rego on the boat and trailer, etc., and what would you do if one of the Rego has expired?