La. Stat. tit. 3 § 742
No livestock shall be sold at any public sale until such livestock have been offered for inspection by the seller to brand inspectors or a designee of the Livestock Brand Commission appointed for such purpose. Brand inspectors are authorized to inspect any livestock being transported by any means, or being loaded or prepared to be transported. Brand inspectors shall have the authority to inspect all livestock together with accompanying health documentation for each animal in conjunction with the Louisiana Board of Animal Health. Whenever health documentation for any animal is not in compliance with the requirements of the Louisiana Board of Animal Health, the brand inspector may stop all movement of the animal until all required health documentation is provided or may require the person who has possession of the animal to return the animal to the place of origin.
La. R.S. § 3:742