Active reserves?

So i am a bit irretated.

I know active reserves from the flyers. if they go overboard XD they are placed into active reserves. that part is clear. but are there any other units that can go into active reserves in our codex?

because the FAQ astates, that DE units that are in active reserves, can come in through our WWP. but the WWP forbidds us to bring in vehicles through the WWP. so who can use it?

I've not read the rules but I take it active reserves are those that are able to come on to the board (having made their 3+ roll or whatever), as opposed to reserves that aren't yet able to enter. Presumably they wanted to avoid someone claiming that the WWP allowed them to bring in any reserve units without having to roll for their availability.

No, active reserves, a those that where on the table, but went back into reserves again. these reserves come in automaticly at the next turn. Examples are, fliers that move of the board, swooping hawks, mawloc.

oh i just found that shocktroops that misshape and roll a 4-6 are placed into active reserves.

good to know.