Infantry carried in halftracks

[Glint]

Thanks guys, I'll check out the manual.
I asked as, I'm sure I've seen in footage somewhere, that say a M3 halftrack loaded with infantry have charged a position with the infantry firing?
That would probably be under the assault conditions as mentioned but, if they are two hexes away from an enemy infantry unit, surely they could fire with cover factors from the halftrack's armour included? That seems to be missed out in JTCS, or am I wrong?