I'm not sure, but do they not mean (If your securities are not fully paid for) by this statement would that not be a Margin account, if they're not paid for?
I'm pretty sure I have the correct answer now from TD Waterhouse, as I said in my post. It did take 3 seperate calls, and multiple confirmations, and finally heard about this "Loan Post" but I'm pretty confident it has to be a Margin Account for TD anyway.
Funny (scary) how difficult this is to nail down hey?