Section 9:2800.59 - Manufacturer knowledge, design feasibility and burden of proofA. Notwithstanding R.S. 9:2800.56, a manufacturer of a product shall not be liable for damage proximately caused by a characteristic of the product's design if the manufacturer proves that, at the time the product left his control: (1) He did not know and, in light of then-existing reasonably available scientific and technological knowledge, could not have known of the design characteristic that caused the damage or the danger of such characteristic; or(2) He did not know and, in light of then-existing reasonably available scientific and technological knowledge, could not have known of the alternative design identified by the claimant under R.S. 9:2800.56(1); or(3) The alternative design identified by the claimant under R.S. 9:2800.56(1) was not feasible, in light of then-existing reasonably available scientific and technological knowledge or then-existing economic practicality.B. Notwithstanding R.S. 9:2800.57(A) or (B), a manufacturer of a product shall not be liable for damage proximately caused by a characteristic of the product if the manufacturer proves that, at the time the product left his control, he did not know and, in light of then-existing reasonably available scientific and technological knowledge, could not have known of the characteristic that caused the damage or the danger of such characteristic.Acts 1988, No. 64, §1, eff. Sept. 1, 1988.Acts 1988, No. 64, §1, eff. 9/1/1988.