Final answer:
Shellstock tags from a shipment of oysters must be kept on file for 30 days after they are received. So option (a) is correct.
Step-by-step explanation:
The correct answer is a. 30 days after it is received. According to the regulations, shellstock tags from a shipment of oysters must be kept on file for 30 days after they are received. This is to ensure traceability and food safety. It allows for proper tracking in case of any issues or recalls that may arise.
Maintaining records for 30 days serves multiple purposes. Firstly, it aids in tracking the source of the oysters, facilitating rapid response in the event of a foodborne illness outbreak. Additionally, it allows regulatory agencies to verify compliance with harvesting and shipping regulations. After the 30-day period, establishments may dispose of the tags, provided that no issues have arisen during that time.
Choosing option (a) not only aligns with food safety best practices but also ensures adherence to regulatory guidelines, promoting public health and the overall integrity of the food supply chain.