Reconnaissance by leaders

[Art Ozols]

I always play with the house rules on skirmisher no more than 4 hexes from a formed unit in open terrain. In light of your situation I'll ask that this would apply to leaders as well, or beyond the boundaries of your army

This strikes me as a gamey tactic moving deep into unknown territory with leaders for recon. Are you able to ask him to recall his leaders back to their own lines?