Blocked Fire and elevation, 4th Ed.

[J6A]

My take on the rule mentioning the specific from firing from higher to lower tells me the rule was written explicitly, therefore lower firer to higher target is not prohibited.  If it was meant to be prohibited both ways, it should say so.    

Who is the proper authority to get clarification from?   AP on CSW?

I get what you're saying, I just in my mind translated that to reciprocal.

AP on CSW, although Mike might defer to people here, since he didn't do the design/development on 4th Edition.