The law allows local authorities to name "designated providers" of a certain scale – currently only achieved by Apple and Google – and require those providers to do three things:

• Allow third-party app stores on their devices;
• Allow application developers to use third-party billing services;
• Enable users to change default settings with simple procedures, and offer choice screens for tools like browsers;

And it forbids them doing three more:

• Engage in any form of preferential treatment of their services over those of competitors in the display of search results without justifiable reason;
• Use acquired data about competing applications for their own applications;
• Prevent application developers from using features controlled by the OS with the same level of performance as the one used by Designated Providers.

This.... this is amazing