M14. Essentially you are allowed to do two consecutive GREEN moves as long as you stay 4BW away from enemy TuGs.
So Tribal (who need a RED), can only do two M2 (advance straight ahead) moves.
So Formed (who need a YELLOW), can do M2 (advance straight ahead) M3 (advance with wheel) M6 (advance and contract) or M7 (expand while stationary).
Drilled (also need a Yellow) can do the same moves as formed or M4 (advance with double wheel) M5 (advance with shift) or M9 (turn on spot).
Skirmishers (ho need a GREEN), can do any two moves (as all skirmisher moves are either white or green).
A Flexible TuG in skirmish formation can Switch Flexibles and then do another move - so yes your example would be fine.
Hope that helps.
Richard