The Louisiana Software License Enforcement Act refers to the Software License Enforcement Act (SLEA) adopted by the state of Louisiana. The bill was voted into law in September 1984 under Title 51 (Trade and Commerce) of the Louisiana Revised Statutes by the Louisiana State Legislature. Sponsored and mostly written by Vault Corporation, the SLEA defines the permissible terms and conditions of a software license agreement and the requirements for enforceability. The reverse engineering, decompiling or disassembling provision of the Louisiana SLEA was invalidated by the United States Court of Appeals for the Fifth Circuit ruling in Vault Corp. v. Quaid Software, Ltd., 847 F.2d 255 (5th Cir. 1988).