If you want to control your users access to the internet using either login codes or by using Credit Card/PayPal® billing then Controlled Access should be enabled.
The Controlled Access requires a login code that can be generated on "Manage Codes" based on time limit, speed limit or no limits.
It will be displayed on the user's device the "Custom Login Page" you have created, the page will display a space where the user needs to type the code and therefore connecting to the Internet. When clicking in "terms and conditions" the user will be redirected to a page with the disclaimer information. You can see how to edit the disclaimer here.