a somewhat wider point, but are Ammo Boots a 'good' thing regardless of whether this or that rule book says they can or cannot be worn?
Ammo Boots are only good for foot drill on concrete/tarmac, and moreover they are only worth having if everyone/nearly everyone has them. they can't be worn inside, and they can't be used on a training area or range. is it a good idea to have cadets think that Ammo Boots are required/favoured/smiled-upon because Sqn SNCO's wear them?
if Cdt Jones buys a pair of DMS shoes he can wear them on the Sqn, he can also wear them to school. if he buys a pair of S8's/Assault boots/whatever-they're-called-this-week he can wear them with his blues, and on the range/training area, and he might get away with them at school.
should the ACO perhaps decide that explicitly banning them because they are a dead-end waste of, in some cases, a very finite supply of money is as good a reason as any other? and that the cadet who doesn't buy Ammo Boots (anywhere from £30 to £70 on fleabay..) has money available to buy a more supportive rucksack, or decent waterproofs, or better walking/combat boots...
people will say that this or that purchacing priority is up to each individial, but with ammo boots its not, because they are only really worth having if the whole squad wears them - that puts pressure on the cadet in the way that an individual choosing between a pair of Alt-bergs and a pair of Hi-Tec's doesn't.