(5)The implementation of Delegated Regulation (EU) 2015/61 should not hinder the effective transmission of monetary policy to the economy. Transactions with the ECB or the central bank of a Member State can be expected to be rolled-over under conditions of severe stress. It should therefore be possible for competent authorities to waive the unwind mechanism for the calculation of the liquidity buffer in the case of secured transactions with the ECB or the central bank of a Member State where the transactions involve high quality liquid assets on at least one leg of each transaction and are due to mature within the next 30 calendar days. However, before granting the waiver, competent authorities should be required to consult with the central bank that is the counterparty to the transaction, and also with the ECB if that central bank is an Eurosystem central bank. In addition, the waiver should be subject to appropriate safeguards in order to avoid possible regulatory arbitrage opportunities or adverse incentives for credit institutions. Finally, to align the Union rules more closely with the international standard set by the BCBS, collateral received through derivatives transactions should be removed from the unwind mechanism.