Every program is based on various legal foundations. The most important ones are the respective Study and Examination Regulations. You can find the current study regulations for the Master's program in chemistry here.

Additionally, there are the Framework Regulations for Degree Programs and Examinations and the Statute for Study Affairs of the FU.

And on top of those, there is the Berlin Higher Education Law.

It is not necessary for you to read through all the legal bases. But it could be helpful for you if you know where you can find which information. And you should probably take a look at the study regulations for your degree program.