Subject to the provisions of articles 33 ter et 33 quater, the gross income from buildings or parts of buildings let is made up of the amount of gross revenue received by the owner, plus the amount of expenditure normally payable by the owner and charged to the tenants under the agreements. Subsidies and allowances intended to finance deductible expenses are included in gross income. No account is taken of sums paid by tenants in respect of charges for which they are responsible.
Gross income from the property includes, in particular, income from the rental of the right to display posters or the right to hunt, the concession of the right to exploit quarries, subsoil royalties or other similar royalties originating in the right of ownership or usufruct.