At or below Vo, the criteria that are generally (and erroneously)
thought to apply below Va, do apply, i.e. the wing will stall
before the positive limit maneuvering load factor is exceeded.

People should make sure they see the word "POSITIVE". At Vo you can pull as
hard as you want without exceeding the limit load factor (3.8 for normal
category), but since the limit is much lower for negative load factor (0.4 x
3.8 = 1.52) you can't push as hard as you want.

Barry