The other point I would make in this regard is a bit of a technical one, but nonetheless it's potentially important. The bank already has a broad power to make loans backed by collateral. There is a popular form of transaction in financial markets called the “repo”. This is a transaction that is essentially lending, but it is technically a sale. This is a transaction where the two institutions agree, or the two parties agree, that one will purchase a security and then sell it back to the other at a prearranged price, a higher price. The difference between the purchase price and the resale price is the embedded interest rate in the transaction. So the purchase and then the subsequent sale are linked. It's a way of doing secured lending because the security resides with the purchaser if the counterparty isn't around--because they go bankrupt--to make the repurchase.
This is the sort of transaction that having this list allows the bank to do. So it would allow it, for example, to make repurchase transactions in the same set of instruments for which it can make what is legally a loan, using those instruments as collateral.