A reference lease agreement is also included to help tenants review their own leases, to understand what the usual clauses may be. Recommendation 2.3: If, under the lease agreement, the lessee is required to enter into a contract with a third party or to make payments to the lessor or other third party for services (with the exception of incidental and related costs) or equipment (including furnishing and maintenance costs) incurred in addition to the rent paid to the lessor. And in any case: Recommendation 2.4: Advertising and promotion costs cannot be adjusted during the rental period and the owner must present each quarter an account via the cashier clearly indicating the costs incurred by the owner and the identity of the third party received. The owner may not require an increase of more than three percent (3%) of the price paid by the third party for such services. . . .