The following occurs in every Divine Service:
At the conclusion of the DISTRIBUTION or during the POST-COMMUNION CANTICLE, the remaining consecrated elements are set in order on the altar and covered with a veil.
What I find interesting about this rubric is that it runs contrary to Luther's own counsel about consuming the remaining elements at the end of the Distribution. This is the final rubric of the service dealing with the consecrated elements! It is not unreasonable to assume that they'd be removed from the altar, but there is no rubric that they be. In our own parish practice, whatever has not been used for distribution is consumed by pastor(s) and elder(s) following the Divine Service in the sacristy, after the elements are removed to that room. Perhaps when the Desk Edition appears (it will appear, surely?), we'll have more information in regards to this particular rubric.