The bank developed an open-end mortgage that is recorded, but that the customer must specifically request in order to get a copy. So - for those customers who keep a copy of the mortgage, it says that the mortgage secured repayment to the bank under the [HELOC] account. The mortgage refers to the HELOC terms and conditions brochure twice, once under default provisions, and once under future advances provisions. Other than the date by any signature, there is no date given for the opening of the HELOC account.
I'm no lawyer, but somehow this seems awfully weak.