It almost sound like they want BTC legal on their lands. Its kinda of an approval to the technology, blockchain is one of the best in our times and if they use this on thier banks, its going ot be challenging for the rest of the banks in the world. They rest are working with XRP, do you think they will also be trying XRP?
It's the opposite, they don't want BTC to be legal, but this is only my opinion. They want to use the blockchain technology, maybe they can cut some costs with it, maybe not. Maybe it's just a good marketing trick to sustain the interest about their services. There's nothing mentioned which can be in connection with bitcoin, only the blockchain technology. Because the systems of the banks are closed and centralized, you can't really be sure that they will implement the blockchain even if they communicate it.