Edward G. Cazalet, TEMIX https://lists.oasis-open.org/archives/energyinterop-comment/202111/msg00001/Cazalet_Comments_on_CTS.pdf
There is no constraint on expiration time. See WD17 Section 3.2.3.
Conformance (text pending) will have the same description.
6. In conflict with the Proposal, there are valid use cases for a tender that expires after the start time of the associated interval.