The Terms and Conditions Field available out off the box, has a dialog element bindref in the dialog panel named "script".
But the Terms and Conditions Field has two fields (a text field for capturing the terms and conditions and a check box field for capturing the acceptance of the terms and conditions by the user)
My doubt is which field gets binded to the schema or xfa form model, is it the check box or the text field.
As of now, bind Ref property is not supported in terms and conditions field. But if you have a use case, I would like to hear it.