Determine which legal clause the following paragraph belongs to: (bb) 
unpaid" are deleted and replaced by "any amount which will become 
payable to the other party under paragraph 5 during the period after the 
time at which the calculation is made which is equal to the minimum 
period for the delivery of margin applicable under paragraph 4(g) or 
which is payable to the other party under paragraph 5 but unpaid".