Purchase of a boat with pickup on March 10 before noon – Incoterms® 2020 Purchase of a corrugated cardboard machine in different assemblies and parts, non-containerized: Justinian first defines an obligation (obligatio)  in its institutions, book 3, section 13 as “a legal link to which we are bound by the need to perform an action according to the laws of our state”.  It continues to separate debt law into contracts, torts, quasi-contracts and quasi-delicts. Each commitment has four essential conditions, also known as commitment elements. . . .