These initiatives sometimes seem to go beyond the idea of a central bank bringing its settlement services on DLT and maybe they could alter or even call into question the role the central bank currently plays as operator. Some initiatives allocate the role of a "notary" to the central bank – controlling the amount of central bank money circulating in a DLT environment.
Others foresee that a trustee ensures that the values circulated in a DLT-based solution are fully backed by a corresponding amount of central bank money held "off-chain".