Question B1: What haircuts should be applied to collateral for the calculations of exposure net of collateral?
Banks should apply the standard supervisory haircuts from the capital framework.

Question B2: If a counterparty places initial cash margin against a derivatives facility, but has no signed ISDA / CSA in place, can this cash margin be considered as collateral for Replacement Cost calculations?
Yes, provided the arrangement allows the bank to retain the cash in the event of a default by the counterparty.

Question B3: Can collateral received under a CSA be considered as part of the RC calculation in absence of a netting agreement?
Yes. Note that in the absence of netting, the netting set would consist of a single trade and any collateral corresponding to that trade.