The precise time of the conclusion of the license agreement is important since from this time on, the provisions of the open source license become effective with their associated rights and obligations. The license agreements are regularly added to the software in an independent file, generally termed "license" or "copying". If the user receives the software including the license file, this does not constitute a license agreement. According to German contractual law, two corresponding declarations of intent are required, the "offer" and "acceptance." In addition, the contents of the agreement must be clearly identifiable for an agreement to be effectively concluded.