The Fields - Terms of Service plugin adds a custom field type (tos) that allows you to add terms field(s) to your registration form. In case you missed that - you can add terms FIELDS (plural) to your registration forms.
To comply with the EU GDPR requirements, this field was developed to allow an administrator to add a required acceptance field to the registration form, and add additional fields later, while maintaining records of the users acceptance of each terms document. If you haven't researched the EU GDPR requirements, take a look here: http://www.privacy-regulation.eu/en/19.htm
The rules require sites to re-acquire acceptance of terms upon those terms changing while maintaining the details of the previous acceptance. This plugin enables an administrator to add a new terms field to the registration form, linked to a new terms document - as many times as necessary.
To protect site owners, the plugin stores the date/time and IP address of the acceptance. With this detail, any litigation can be met with hard data.
Another extension that can help with GDPR requirements is the Profile History plugin, which can monitor for and notify users of changes to their profile field values. Take a look at the GDPR Bundle to save 20% on all of my GDPR extensions!