Louisiana Civil Code Tit. III, Art. 1812. Impossibility or unlawfulness of one item of performance

When the choice belongs to the obligor and one of the items of performance contemplated in the alternative obligation becomes impossible or unlawful, regardless of the fault of the obligor, he must render one of those that remain.

When the choice belongs to the obligee and one of the items of performance becomes impossible or unlawful without the fault of the obligor, the obligee must choose one of the items that remain. If the impossibility or unlawfulness is due to the fault of the obligor, the obligee may choose either one of those that remain, or damages for the item of performance that became impossible or unlawful.