Artillery shooting over a crest

[Saxonian]

Here is the situation:
A unit is defending 2MU behind the crest of a hill.
The enemy have a reformed infantry unit with an artillery attachment and an artillery unit within 6MU on the other side of the crest.

The enemy artillery cannot shoot - they have to be within 2MU of the crest to shoot over it.
The enemy infantry can shoot - within 6MU of the enemy.

What about the artillery attachment? Is it able to contribute shooting dice, even though it is outside 2MU of the crest?
This is even more important in the case of an attachment to an unreformed infantry unit that has only the arty attachment for medium range fire.

[pugsville]

Rules say artillery only fire over crests at close range.
page 67

[Saxonian]

Yeah, that's what I thought.
Just wanted to check there wasn't some kind of qualification because it is an attachment.

[hazelbark]

recall this is simulating the skirmishing crossing the crestline.