third coast

Looking at build information from Chrysler for a 1991 Cherokee Laredo and noticed it includes option code GRBP: Entire Fleet Alike Key (FREQ x). Apparently it was sold as a fleet vehicle with same keying for each that was part of that fleet. Anyone know anything more specific about this option? It also has Remote Keyless Entry. I have found that police package vehicles often have this option but there is no indication of this being a police or fire department vehicle. I can't find useful info in searching this option. I am wondering how prevalent similar keyed vehicles are. Rekeying seems like a lot of effort.

Another option was code ARCP: Rubicon Plus Group. This XJ is very original and I am not aware of any unique features such as skid plates, heavy duty shocks, etc. Anyone have any info on this option? Thanks!