[Rules] Who commands the SPAs?

[plloyd1010]

A consensus question, since I don't recall it being specified in the rules. We have "regular" leaders, with a subtype of cavalry leaders, tank leaders, and the offshoot of armored car leaders (always inherent). As Vince noted in separate thread, "tanks" have the NATO armor symbol. Tank leaders command them and APCs. "Regular" leaders command infantry, guns & APCs. AC leaders command no one except other armored cars. Thing is that there are a couple other types, and AP seems to be adding more. I can see how regular leaders might be commanding units like the M-13 (Katyusha), but not the M7, but then again the Grille should be. Then there are the M-16s & Wirbelwinds maybe not really beholding to anybody.

Who commands your non-transport vehicles?