Spring RTS Engine

What happens if there are multiple Allow[Command,Buildstep,etc] callins in different gadgets? Are they all called and if any one returns false then the the action is canceled? What order are they called in (layer = N)?

open gadgets.lua and read

Found it!

The gadgets are called in the order of lowers layer number first. On the first false return, no more are called, and the command returns false.