The tenant may add related or complementary activities to the business provided for in the lease.
To this end, he must make his intention known to the landlord by extrajudicial act or by registered letter with acknowledgement of receipt, indicating the activities whose exercise is envisaged. This formality serves as formal notice to the owner to make known within two months, on pain of forfeiture, whether he disputes the related or complementary nature of these activities. In the event of a dispute, the court, to which the most diligent party has referred the matter, will rule in the light, in particular, of changes in commercial practice.
During the first three-yearly review following the notification referred to in the previous paragraph, it may, notwithstanding the provisions of Article L. 145-38, be taken into account when setting the rent, if the adjoining commercial activities have in themselves led to a change in the rental value of the leased premises.