Virginia, here’s a definition I found online. Hope it helps. I’ve never heard of this product.
DESCRIPTION Milk powders and cream powder are milk products which can be obtained by the partial removal of water from milk or cream. The fat and/or protein content of the milk or cream may have been adjusted, only to complywith the compositional requirements in Section 3 of this Standard, by the addition and/or withdrawal of milk constituents in such a way as not to alter the whey protein to casein ratio of the milk being adjusted.
Minimum milkfat42% m/m
Maximum water** 5% m/m
Minimum milk protein in milk solids-not-fat** 34% m/m