Requiring users to accept terms and conditions when logging in
To configure the site so that users must accept terms and conditions when logging on to the site, go to the Site Management (Tools - Site Configuration), expand the Security node and choose Login and sessions.
You have three options:
Never: Never request approval of terms and conditions from users.
Once: Users must accept terms and conditions only the first time they log on to the site. If the terms and conditions change, they will be required to accept the new ones.
Every time: Users are presented with terms and conditions every time they log on to the site.
The actual terms and conditions are added to the text box seen in the screenshot. These can be formatted using markdown syntax.