Sublessor Estopped from Voiding Sublease Based on Main Lease Illegality

A person who had signed a lease for commercial property, later agreeing to sublet the space, sought to terminate the sublease agreement, asserting that the main lease contract was void because the property's use was incompatible with local planning regulations regarding the nature of the business authorized on the premises. The court rejected the claim, reasoning that the sublessor, having benefited from the sublease agreement and being aware of the initial lease terms and the nature of the sublessee's commercial activity, could not subsequently invoke the illegality or invalidity of the main lease, based on zoning restrictions related to the commercial purpose, to release themselves from their obligations under the valid sublease contract.