Just in case you or your opponent need any more info, this is from Kevin Duke in another thread on a related topic Advance Over The Top combat card questions :
Sometimes cards trump normal rules in the C&C series, but not here.
The rules specifically say:
In case of conflict, between the basic rules in this book and a combat card, the rules of the card take precedence, however, terrain movement and battle restrictions will always apply, unless stated otherwise
on the combat card.