Final answer:
Milk and milk products must be pasteurized with sell-by dates of up to 90 days for UHT pasteurization.
Step-by-step explanation:
Milk and milk products must be pasteurized to ensure they are safe to consume. One method of pasteurization is high-temperature short-time (HTST) pasteurization, where milk is heated to 72 °C for 15 seconds. Another method is ultra-high-temperature (UHT) pasteurization, where milk is exposed to 138 °C for 2 or more seconds. UHT pasteurized milk can be stored in sealed containers for up to 90 days without refrigeration.