Question:
Is intrinsic AA cumulative? For example, a 20-10 SS Arm XX would have 3 points (1 pt for unit strength, 1 for SS, 1 for Axis C/M). I say yes, but we want to make sure.
Answer:
No, intrinsic AA for units is not cumulative for the individual unit; if the unit satisfies any of the conditions listed, then it has one point of light AA, period. Intrinsic AA from map features is cumulative, but the rules say this specifically so that is not a problem. Since the rules do not say unit-based intrinsic AA is cumulative, we can assume it is not. Note also that in the example to Rule 22A.3, the British infantry division is listed as having one point of intrinsic AA; note well that this could easily be a 9-8 or stronger British division, but the note ignores that issue. Obviously then, the division is getting its one point of AA by virtue of being an Allied division, the strength of the unit is ignored. Therefore, we can conclude that satisfying one condition grants the unit the AA, but satisfying more than one condition does not increase the AA strength of the unit.
Source:
TEM 59/60