Article 555. The contract for the sale of real property

1. The contract for the sale of real property must provide for the price of the property. 2. The rules for determining the price provided for in article 424, paragraph 3, of the present Code shall not apply. and the price of the building, structure or other immovable property on the land specified therein includes the price of the part of the land transferred with the immovable property in question. 3. Where the price of real property in the contract for the sale of real property is set per unit of its area or other measure of its size, the total price of such immovable property The property to be paid is determined on the basis of the actual amount of immovable property transferred to the buyer.