If Emery decides to let Lovie stay on in 2013 it may be difficult to keep Tice in his former role as OLine coach but it's not without precedent in Chicago. Babich went back to being just the LB coach after his one year as DC.
So it can be done if Tice accepts that demotion but it would also almost certainly mean that Bates would become the OC. I would think that any new OC hired from outside of the organization would want to hire his own staff and almost surely is QB and Line Coaches.

