Standardization.
CFR · 2024-01-01 · US · Title 7
The standardization of the product to obtain a finished product of a given composition shall be accomplished by the addition or removal of milkfat, milk solids-not-fat and/or water. The ingredients added to accomplish the desired composition shall be of the same hygenic quality as the product being standardized.
official document · source cfr-2024 · id 7:§ 58.918