HN39
OK, thanks, I didn't have the documentation to check back exactly when it appeared in CS25, but on checking back I see that JAR25 Ch 13 has the same wording, but with one important difference:
Stall warning must continue throughout the demonstration until the angle of attack is reduced to approximately that at which stall warning is initiated
If you read that with the requirement that stall recovery is to be initiated promptly then one can see why the designers didn't cover the case of an aggravated (I like that description) stall. Without "throughout the demonstration" they would have to cover the AF447 situation. - at least that would be my interpretation of the rule.