Exemptions have already been be granted: This will pave the way for others to be requested. "Decals: Decals other than those included with the kit may be used. They may be used to replace old/damaged/missing kit decals. They may also be used to provide alternative insignia and markings to those originally provided with a kit. More problems will follow as contestants will ask if this is allowed why not that?
I think the timing announcing, on the 2022 convention website, the elimination of OOB being replaced with a different BKB category was premature. Now being informed here, by the head aircraft judge, I understand his reasoning. However, the announcing of these changes should have been made at the upcoming 2022 convention and then deployed in the 2023 convention.