There is an example of the Consumption Block - Time of Use Tier message in EMIX.
This needs to be defined as part of a profile in EI.
As already discussed extensively, it is not a transactive message - a notice of current retail price structure. Not sure if that means it needs to be separate from EiQuote. I am happy with any solution that keeps the intended TEMIX profile intact.
Comments on the "example" payload are being submitted to EMIX.