Alan:
Re-reading your question:
One raceway to/thru roof to 'units' from two tenant meters??
Sounds like a 'design' thing. I know of no Article to prohibit this.
From the safety angle, are the terminations identified?
We (NJ) have the same basic Appeals system that you described; we also have DCA (State) people we can get interpertations from, BUT, they are that person's OPINION. The AHJ has the 'Final" decision, albeit subject to the Board of Appeals.
Usually, I try to 'work out' situations one on one, not saying it works all the time, but......
John
