Interpretation of the "max" option of stateful tracking

[Federico Giannici]

I'm trying to use the "max ⟨number⟩" option of the Stateful Tracking of 
PF (OpenBSD 5.7 amd64). I'm not sure how to interpret the phrase "[it] 
Limits the number of concurrent states the rule may create."

The limit is against the number of states created by ONLY THAT specific 
rule (I need this meaning), or is against the TOTAL number of states 
created in that moment by ANY rule?

Thanks for the clarification.