You can now confirm participant USAT license validity automatically for your TriReg event.
On the General Event Setup page at the bottom of the Event Basics you will want to enter your USAT Event ID
Then click "Category Setup," and click "Edit" next to the category. Toggle on the "USAT" setting, " and save.
TriReg has full a full USAT Membership integration, if the participant already has a membership they just need to choose "Yes" and enter their number. If they do not they will have the option to purchase a membership during registration.