Designated Premises Supervisor (DPS) Explained. If your business sells alcohol, you’re legally required to have a Designated Premises Supervisor (DPS) named on your premises licence. But what exactly does that mean — and why is it so important? In this post, we’ll explain the role of the DPS, their legal responsibilities, and how Licensing Professionals can help you stay compliant. We’ve also included a short video to make it even easier to understand.