Nozipho runs a hair and nail salon at Jacob’s commercial property and has been paying Jacob R12 000 a month for 15 years. Jacob and Nozipho have a good tenant and landlord relationship. However, Jacob informs Nozipho that he will be selling the same property to Thabo. Nozipho is worried about her position as a tenant when purchases the property. 

1. With reference to the relevant doctrine, advise Nozipho on her position as a tenant when Thabo has purchased the property.