Further clarifications on Orders

just trying to continue a discussion from here.

so, to recap a unit with AV 1/2/3 and an officer need to spend 12AP to conduct three actions (say to move three times).

i'm assuming that if the AV is mixed you use the worse scores - so if a AV1/2/3 officer
is ordering a group with AV2/2/3 then the cost is in effect 3+4+6=13?

does this mean that groups cannot undertake actions without a leader? i.e. a bunch of models in a firing line cannot fire as a group unless a leader orders them to?

yes, 12 AP are required. Usually a has the same AV of his men as he belong to the same unit.

With no leader, no Group actions

thanks. will take that to mean that opportunity fire by a group will also require the leader *and* group to be able to act. (i.e. if the leader has already used 3 actions then the group cannot be ordered to fire - but that individual models can fire)

note that in opportunity you use additional AV.
I mean if you act during your phase, and you use all AV (you made 3 actions), you can still try opportunity.
In most case you will not be able to do so, as to fire by opportunity you need a loaded weapon and if you acted during your phase there are chances you have no more a loaded weapon, but it is possible.