There are these "emergency food bars" (like datrex and mainstay) which could be useful to keep for emergencies. I'm trying to understand whether I can keep some in my car trunk (and be able to eat them later). My car is out in the sun in CA most days, so it can get pretty hot (someone once measured 120--140 F in the trunk).

The bars are supposed to have a shelf life of 5 years. But I didn't find any official source about what the storage conditions should be. Some people on the internet say they can be stored at any temperature from -40 to +300 for 5 years. I'd like to see sources for that.

With MREs, there are these nice charts of shelf life vs. storage temperature. I'm wondering whether there is something similar for these datrex bars.

Also, they say they are "SOLAS compliant" and "USCG approved". I'm wondering what that means -- do these certifications include storage temperatures? I looked up SOLAS text online, but didn't find anything about rations.