Thanks KlasF11.74:
"Whenever Light Dust can exist (as per the conditions given in 11.71), Vehicle Dust can also occur...."
F11.71:
"Light Dust can occur only in a scenario that uses ≥ one Desert Board, and only if EC currently are Dry or Very Dry..."
F.1:
"Desert Boards are defined as those numbered 25-31..."
Scenario uses boards 26, 27, 31 and SSR 1 says: "EC are Dry withno wind at start".
So all the requirement for Vehicle Dust are fulfilled.