(1) Where the subject matter of a sale is subject to a superficies, servitude, chonsegwon, right of retention, or pledge and the buyer was unaware thereof, the buyer may rescind the contract only if the objective of the contract is not unattainable thereby. In other cases the buyer may only claim damages.
(2) The preceding paragraph shall apply mutatis mutandis to the cases where a servitude which has been represented as existing in favor of the immovable which is the subject of the sale does not exist or where a registered lease exists on such an immovable.
(3) The rights mentioned in the preceding two paragraphs shall be exercised within one year from the time the buyer became aware of the fact.