The general terms and conditions of BITKOM (Bundesverband Informationswirtschaft, Telekommunikation und neue Medien e. V.) issued to t&p on 17.12.2019 or 13.01.2002 (Version 3.0/2.1) apply:
Contractual terms for transferring of software (purchase) (english) 43.59 KB 7 downloads
...Contractual terms leasing hardware and standard software (english) 51.31 KB 9 downloads
...(These documents are courtesy translations. The German version of these terms shall be the legally binding version)