At common law, the interests of the landlord and tenant may be transferred freely unless (1) the tenancy is at will; (2) the lease requires either party to perform significant personal services, which...At common law, the interests of the landlord and tenant may be transferred freely unless (1) the tenancy is at will; (2) the lease requires either party to perform significant personal services, which would be substantially less likely to be performed if the interest was transferred; or (3) the parties agree that the interest may not be transferred.