Displays your Terms & Conditions to users who want to register, and requires that they accept the T&C before their registration is accepted.
If T&Cs are changed users with an existing account will be asked to accept the new version, and will not be able to log in until they have.
T&C text should only be entered by administrators or other highly trusted users. filter_xss_admin() is used to filter content for display, this is a very permissive XSS/HTML filter intended for admin-only use.
The Checkbox Validate module is required.