According to the information we have received the promotions for the CTX Supervisors and Leads will be announced prior to the effective date of the new shift schedules.
How about announcing them prior to the new shift bid days? Give the people who might have an opportunity for a better schedule(because they moved up a few slots because of the promotions) a better chance.
This is an easy and painless way to show some appreciation for the workforce that has helped make this company what it is today! Show some good will.