Final answer:
Meat prepped at 7:00 PM would typically expire 24 hours later under general food safety guidelines, assuming it is refrigerated immediately and kept at safe temperatures.
Step-by-step explanation:
If meat is prepped at 7:00 PM to last through the night shift, and considering food safety guidelines, the meat should typically not be kept at room temperature for more than two hours. Since no specific expiration policy is mentioned, a general food safety protocol can be followed. Assuming that the meat is immediately refrigerated after prepping and the refrigerator is kept at safe temperatures (below 4°C), the meat is usually good for up to 24 hours.
However, some establishments have stricter policies, potentially requiring food to be used or discarded more quickly. Without additional information on the specific policies of the establishment in question, a conservative assumption would be to expect the meat to expire 24 hours after preparation, which would be 7:00 PM the following day.