[Rules] Who commands the SPAs?

[Poor Yorek]

It appears that the 4th Ed rules address this under the definition of an AFV. "Tank" leaders are AFV leaders and can activate any unit with a printed armor value, including SPAs. Rules 6.8 and 6.83 specify that regular leaders can activate SPAs and other specified vehicular units (APCs and ENG vehicles), but not add their morale bonus. So the answer in 4th Ed. to the query "who commands the SPAs?" is that a leader of either type may.