The first step for enabling Construction site regulations for your organization, is enabling Construction site regulations in your organization settings.

After enabling Construction site regulations, you will be asked to edit the custom message. This is where you type the message all project members receive before they can accept the Construction site regulations, and access the projects.
​
It looks like this:

When you enabled the Construction site regulations in your organization settings, a folder was created within your organization folder.
​
Go into one of your projects that are part of the organization, and find the Construction site regulations folder.

Add documents relating to Construction site regulations in your company to this folder.

When members click the "Open Construction site regulations" link, they will be sent to this folder.

Until they accept the Construction site regulations, they will not be able to access the project.