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.
cooking operations must meet NFPA 96, Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations. | NFPA 96 requires an inspection and servicing of the fire-extinguishing system be made at least every 6 months by properly trained and qualified persons.