MAG,  you are correct.  Jay posted links to Ohio and Minnesota.  Also, someone else posted a third link.  Only the information from Minnesota did not include information on calcium or magnesium. Without that information you don't know whether it is Hi-Cal or Hi-Mag lime.  What I DID see is this:

"Questions? Contact the MDA at 651-201-6275"

Since you live in Minnesota, I suggest you take them up at their offer.  Pick up your phone, call MDA and ask WHY they don't supply that necessary information.

It might be that all lime in MN is Hi-Mag - I don't know.  Still, that information should be supplied so the customer is aware.  In this day and age, it is simply absurd not to be making that information available.  So.... Pick up your phone, and make the call.....