i have a fun one. 200 amp service panel feed undergroud from a pole 150 feet away. 100 amp sub panel mounted on the feeder pole, and a detached shop feed from the 100 amp sub panel. the only grounding currently is a ufer at the service panel"i dont trust ufers". The way i read nec i need a ground rod at the service, a rod at the pole for the sub, and a rod at the shop sub for the building. and do not need to pull a ground between these three points