IG questions.

I'm fairly new and a friend that plays locally suggested I post here. I had a few questions and in looking around I couldn't get a clear answer.

1. Can Imperial Guard orders be transferred to a vehicle such as a Manticore or Basilisk? I always thought no, but someone mentioned they saw it in a local tournament so I thought maybe I was wrong.

2. Does anyone know why the Chimera is the only vehicle from which you can issue orders? It seems like you'd be able to do it in a Valkyrie as well, so you could do an all-airborne army - or is that just silly?

Q1: Orders can only be issued to Guardsmen. Your not wrong. If you read page 29 of the IG Codex it explains it all.

Q2: The reason is that Chimera's are a Mobile command vehicle. It is kinda silly but thats GW for you. ;)