Air and Artillery by the Map Optional Rule for D85

[Elxaime]

Just to confirm my initial question.

With the optional fire by map rule ON, the following effects are in place:

1. all arty/air can fire at any hex they can reach.
2. fire is at 1/4 effect if the hex is NOT spotted by a friendly unit
3. fire is also at 1/4 effect even if the hex is spotted IF the friendly spotter is not from the same organization.

Number 3 is the one I wanted to get corroboration on.

EXAMPLE:

1st Division is making an attack. 1st Division artillery fires at full effect at hexes spotted by 1st Division units and 1/4 effect at unspotted hexes AND hexes spotted by non-1st Division units.

Is this correct?