Legal Principle: A product cannot be sold in shops to consumers after its date of expiry.

Fact Situation: Lata, while shopping, notices that the milk packets on the shelves are due for expiry on that day. She objects to this to the shopkeeper, saying that since she was there to buy milk for the next day, keeping the milk on its date of expiry was against the law.

Which of the following statements is the most appropriate in relation to the legal principle stated above?