Commercial law concerns all the legal regulations of sales representatives. The most important legal regulation is the German Code of Commercial Law — Handelsgesetzbuch, HGB —. If business is involved, HGB applies. Many questions of interpretation are also solved by German statute law, commercial practice and trade customs.
German commercial law has emerged from German municipal law and is heavily influenced by Italian and French commercial law. In some cases, company law, intellectual property law, securities law, banking and stock exchange law are also taken into account.