Not trying to preach here, but there is no "waiver" for UGA to sign. Kirby has nothing to do with this. The portal was designed to keep the coaches out of it.
The Compliance office from UGA has 48 hours to put the student athlete (SA) in the Transfer portal once they request it, which allows other institutions to make contact with the SA. They SA does not have to inform the old coach to do this. From there, it's all on the compliance office of the new school to do the paperwork for the NCAA to approve or reject. The old school can also submit paperwork, through the compliance office, to add details.