When Ursula von der Leyen took on her mandate as president of the European Commission in 2019, she assigned EU competition officials the job of making sure “competition policy and rules are fit for the modern economy.” Next week, officials in Brussels are set to present the results of their work, offering up one of the most hotly anticipated legislative proposals in years.

On Dec. 9, the EU’s executive body is set to unveil the Digital Markets Act—its biggest effort so far to regulate tech giants like Apple, Facebook, Google, Microsoft and Amazon. The new legislative package will be aimed at remedying unfair competition in the 27-member bloc’s digital economy much more quickly and much more aggressively than is currently possible under the EU’s existing competition tools.