This is only going to get sticky if after Feb 20th Rivera is hired as the DC. If he is hired as the HC, no problem.
But.... if it appears that we brought him in under the guise of a head Coach interview just to see if we want him as DC then there are going to be a few problems.
Because.....
1) The reports are already out that Norv wanted Rivera as DC.
2)If Rivera gets a wink and a nod from Jerry, during the HC interview, that he wants him as DC after the 20th and Rivera does not negotiate in good faith with the Bears before then, it will appear as if we already offered him the DC position before we were supposed to.
3) In this case you almost have to wait to name Norv the HC until Rivera is available to become the DC. Otherwise it looks like you already have an agreement in place.
All hard to prove but it would look very fishy to hire Norv on Feb 5th and then pickup Rivera on Feb 21st. IMO