October 28, 2021 from the COR Detroit with clarification from the Kof-K:
HECKERS ALL PURPOSE FLOUR which contain "NT" in the code is milled from Yoshon winter wheat in a facility that handles only winter wheat. (For those makpid on malt in flour, probable Chodosh date for malt is Dec 15 / “Best If Used By” date of June 15 23.
The Whole Wheat and Self-rising were being done under the OU at another mill.