Here's the definition that's on our security deposit page, which doesn't get into the nitty-gritty: Normal wear and tear is a term that Wisconsin law does not define.
(3)Protein Fat-Free Percentage, Protein Fat-Free Content, PFF Percentage, PFF Content or PFF of a product means the meat protein (indigenous to the raw, unprocessed pork cut) content expressed as a percent of the non-fat portion of the finished product.
The jurisdictional distinction between FDA and USDA FSIS continues in regulating labels; as a general rule, FDA regulates the labeling of all food except those regulated by USDA FSIS (i.e., meat and poultry products) and those regulated by Alcohol and Tobacco Tax and Trade Bureau (TTB).