gross-minus-net amount
- (a) the sum of the margin amounts received from each client regarding positions held for such client in that omnibus client account and
- (b) the amount of margin calculated on a net basis for all of the client positions recorded in that omnibus client account and paid by that firm to the authorised central counterparty.
51at any given time, in respect of an omnibus client account maintained by a clearing member firm and the positions recorded therein, an amount equal to the difference between: