Prevent user from accessing certificate on dial until all other parts are visited.

I have created a dial in Storyline 360 to summarize my course. I would ideally like the user to visit each part of the dial in order before getting to the certificate part of the dial where they can print off their certificate of completion.

Each part of the dial opens a layer and hides the dial. Users click on a checkbox to bring them back to the dial (base layer).

At the very least, I need a way to restrict the user from accessing the certificate until all other layers are visited.