To the best of my knowledge Jow Ga doesn't have a strategic approach.TCMA (never mind VT) is defined by strategic approach and conceptual base.
If a guy had one arm and came into your school to learn wing chun and because of his one arm he had to alter some of the techniques to fit his limitations, then would he still be doing wing chun? If your school was the only place where he was learning martial arts, then it would mean that he made the changes by understanding Wing Chun techniques that you taught him and how to best use Wing Chun to fight with one arm.