Fresh Pork Sausage is prepared with fresh pork or frozen pork, or both, not including pork by-products, and may be seasoned with condimental substances as permitted under Part 318 of this Article. It shall not be made with any lot of product which, in the aggregate, contains more than 50 percent trimmable fat, that is, fat which can be removed by thorough, practicable trimming and sorting. To facilitate chopping or mixing, water or ice may be used in an amount not to exceed three percent of the total ingredients used.