PackagedProductDefinition.packaging.shelfLifeStorage.specialPrecautionsForStorage has cardinality 0..1.
In EMA IG, it is 1..*. It has to be repeatable, because multiple precautions may apply (Do not freeze, Store in the original container). EMA IG also makes it mandatory to explicitly state that no special precautions apply - this might be different in other jurisdictions.
PackagedProductDefinition.packaging.shelfLifeStorage.specialPrecautionsForStorage has cardinality 0..1. In EMA IG, it is 1..*. It has to be repeatable, because multiple precautions may apply (Do not freeze, Store in the original container). EMA IG also makes it mandatory to explicitly state that no special precautions apply - this might be different in other jurisdictions.
I propose leaving it 0..*