How do I make a text statement that users must accept before the form can be submitted e.g. a disclaimer for liability?

How do I make a text statement that users must accept before the form can be submitted e.g. a disclaimer for liability?

Hi I'm making a form that can be filled in by my clients to record their information. In my line of work, my industry regulator requires that clients be informed about costs, and the nature and limits of the work that can be undertaken. The text is about 500 words and they must read it and agree to the terms before I can start work for them. How do I create a text statement that is coupled with an accept or decline button.