Moving: An individual may move one square forward (directly or diagonally) at
a cost of one AP. Facing of the individual does not change.
Sidestepping (and Backstepping): An individual may move to the side or to the
rear (directly or diagonally) at a cost of 2 APs. Facing does not change
I agree, since it is not specifically forbidden in the rules, it is allowed.
However, I was wondering if there was any reputable commentary on the subject in the past decades. Surely, I can’t be the first to raise this question.