The question first:
Can a unit charge (A) the front of an enemy unit (B) that has no ZoC (because it is an ART, a WWG, LI in open or any other reason) if during the conformation after the contact ent ...
Can a heavy troop charge the front or a LI in open that have heavy troops behind that exert Zoc through the LI or must declare the charge against the unit behind the LI.