You can find out about fundamental legal issues for Open Science here:

• Legal Issues in Open Science (German) is a guide by Till Kreutzer and Henning Lahmann that was created in the context of the Hamburg Open Science (HOS) programme and which focuses on the legal situation in Germany.
• Frequently asked legal questions (German) about Open Science by the Hamburg Open Science programme, focussing on Germany.
• The handout Copyright law in science (German) of the Federal Ministry of Education and Research.