The article “DMM Revision: Labeling List Changes” in Postal Bulletin 22278 (2-11-10, pages 43-45) announced an incorrect date for mandatory compliance. The sentence is given again below with the corrected date in bold.
Mailers are encouraged to label according to these revised lists immediately, but must use these lists starting April 15, 2010.
— Network Operations, Network Development and Support, 2-25-10
