Was looking over the Guard Codex and knew that you could take 3 Valks per choice as a squad, I started to think that if you did take three that must mean that you would have to keep all three of them together or maybe..... they could split up since they were transports.
So I looked up and seen that units of vehicles - squadrons (Page 64 40K RB) move and must maintain a 4inch unit coherency. But I was wondering if there was anything for units of Valkyries since they are transports as well? I could not find anything to support or allow them to be able to split up at any time.