A Terms and Conditions / Terms of Service option can be added to a registration form for a Level. This can be setup and edited in the Setup > Levels > *Click on Level Name* > Requirements section of WishList Member.
After enabling the Require Terms and Conditions option, members will be required to click a checkbox acknowledging they accept the terms and conditions before registering for a membership level.
The Terms and Conditions that will appear can be edited by clicking the Configure button.