[Aeraaa]

ΟΚ, I did a slight mistake on my first reply so I'll answer to your second post:

1-The CB fire of On-map artillery is actually the case of the player (or AI) plotting bombardment on enemy (on map) artillery, NOT automatic CB fire like when off map CBs another off map.

2-Technically it can, but in the same way as case 1 above.