In January 2018, John hired Sarah to work for him as his personal assistance. In the terms of employment, Sarah is not supposed to get married in 5 years' time from the date of her employment. Sarah is now planning to marry Samuel in December 2020. She seeks your advice on the validity of such a term in the employment contract. Advise Sarah and support your answer with reference to the relevant statutory provision.

This is my question. Can you explain detail for me. Thank you professor.