Can a Swiss student without the “Maturité” / “Maturitätszeugnis” apply for the BBA?

Yes, students who have not completed the Swiss Maturity diploma, but who have either started or completed an apprenticeship (Swiss Professional Maturity in commerce also called “Berufsmatura” or “Maturité professionnelle”) can apply for the Bachelor at BSL. At least three years of work experience will compensate for the lack of a Maturity diploma, but the more years of work experience you have, the lower the performance conditions for your studies at BSL will be.