International Merchandising, Inc., headquartered in San Diego, California, contracted with Titan Shipping, Inc. to deliver certain goods to Amalgamated Retailing, Inc. in Norfolk, Virginia. The goods are destroyed in transit, and International Merchandising would like to sue Titan Shipping to recover for the loss, using the Uniform Commercial Code for legal authority. (The UCC has been adopted in all states, and addresses title and risk of loss transfer issues in shipping contracts). In this case, the UCC is an example of __________ law?