I saw a Feeder driver in Omaha once with arms and legs covered wearing shorts and short sleeves. Not sure where he was from but I'd assume his local hub didn't care. Mine on the other hand is a different story.
The key is "public facing employees". Customer contact with feeder drivers is normally limited to workers on a loading dock or other UPSers who couldn't care less what the driver is wearing or how many tattoos he/she may have----all they care about is having their pallets loaded.
In my center we have drivers who were grandfathered in and others who have to cover up any visible tats. We have one poor guy who not only has to wear long sleeve shirts and pants year round but also has to wear a neck gaiter.
bringmethetattoos, do yourself a favor and take any advice from that particular member with a huge grain of salt. He worked for a UPS that for all intents and purposes no longer exists yet he insists upon retelling stories from the days of old thinking that they may still apply today. DO NOT wear pants and then change in to shorts on road----the company does way too many on road observations and is it really worth losing your job over this issue?