Which of the following are examples of restrictive covenants?

Restrictive covenants are provisions in a lease or deed that limit what a property owner can do with their property. They are legally binding clauses that restrict the use of land and are typically intended to maintain the character of a neighborhood or ensure the land is used in a specific way.

In the context of the question, the statement about not sub-letting the property for less than six months exemplifies a restrictive covenant. This requirement directly limits the actions of the leaseholder, ensuring that the property is not rented out on a short-term basis, which could affect the property’s character or the rights of other tenants. By placing this restriction, the landlord may aim to preserve long-term tenancy and stability within the property.

Other options presented do not function as restrictive covenants. Allowing the landlord notice of property sale is an administrative requirement rather than a restriction on property use. Giving the leaseholder "quiet enjoyment" is a right that protects tenants from disturbances, rather than a limit on their actions. Using land for business activities could be a permitted use clause, meaning it could allow certain actions rather than restrict them. Thus, the second choice accurately represents a restriction placed on property use.