GEC(AS)
Grounding
Electrode
Conductor
Auxiliary /supplementary
#6 cu max
PBC
Pole
Bonding
Conductor
#6 cu max
This would bond the pole to the earth. This way it will meet intent of the code.
Think about it this way. Do we not tie( terminate on the same bar) our EGC from the primary side in a transformer to the SBJ, SSBJ and GEC. Outside a building all we have is the supplementary rule if others not available. Either way rod /no rod there can be a chance of unwanted currents. I say ground and bond. Better safe than sorry.
Using a PBC we can have a way to make sure the person's installing/ using messenger to supply power to a pole light will bond this to the pole and then to earth. I have seen this when an underground went bad and they strung between poles installing a weather head. Yep two wires out the head.
Then the verbage can be added to insure compliance for such installations. Wood pole with branch/ Fedders for support of over head conductors.
Just a few thought on it.