How does TANK BUSTER LEADERSHIP DECK CARD ARMOR-PIERCING AMMO work?

By KoP2, in Tide of Iron

ARMOR-PIERCING AMMO says: "reduce the vehicle's armor by 1 as well as the benefits of thick/extra thick armor".

Thick Armor: After defence dice are rolled, change one defence dice into "6" result.

Extra Thick Armor :After defence dice are rolled, change two defence dice into "6" result.

Does this card means, reduce armor by 1 and Thick Armor can change "ZERO" defence dice and Extra Thick Armor can change "ONE" defence dice?

KOP said:

Does this card means, reduce armor by 1 and Thick Armor can change "ZERO" defence dice and Extra Thick Armor can change "ONE" defence dice?

That is how I understand it.

Can't change any dice the way I read it.

Cyscott1 said:

Can't change any dice the way I read it.

Sigh... Any offical answer?