0681cf4e_l___investment_borrowing___NAB__Fee_exemptions_apply_
[Transaction fees] Flexible sub accounts [Fee exemptions apply.] 
Using linked sub accounts, you can organise your borrowing, transactions, and savings the way you want to meet your personal lifestyle goals or needs. Allows for up to 12 sub accounts with a choice of fixed or variable rate. At least, one sub account must have a variable rate.
Portfolio Facility - organise your personal & investment borrowing - NAB
Fee exemptions apply.