"Tanks" having Armor Efficiency

[Blackcloud6]

In Liberation 44 the SRs state that German and British "tanks" have armor efficiency. But I can't find anywhere in the rules the definition of "tank." APCs are defined, Open Topped AFVs are as are Armored cars. "Tank Destroyers are somewhat defined in that the rules say the Marder I & III and the Achilles are TDs in Lib 44; but then it says nothing more about them. So is "tank" just some kind of generic term in PG, the equivalent to "AFV?"

To me, a tank is a turreted tracked vehicle. But rules-wise it does not appear defined.

So is it the tactical symbol that says what a "tank" is in PG? The Marder has this symbol so I assume it is a tank and thus gets armor efficiency, cor[/align]rect?