51 should a default termination occur  the ecb shall  as soon as is reasonably practicable  take an account of what is due from each party to the other under each netting agreement ( including under appendix 2 of this agreement ) in respect of which default termination has occurred and aggregate the sums due from each party to the other under such netting agreements ( including under appendix 2 of this agreement )  in every case in or converted into the base currency  and only the net balance of the account shall be payable by the party owing the larger aggregate sum 