Hi Vishal,
I think this can be done when customizing the form templates in Adobe Lifecycle Designer.
You'll need to...
1. Download and install LifeCycle Designer from the ByD Download Center
2. Download the form template from WoC "Application and User Management" -> "Form Template Maintenance. (The form can also opened directly in LiveCycle Designer from the browser, but I recommend to download it to you computer and edit it there)
3. Extract the downloaded zip file and open the XDP file in LiveCycle Designer
4. Add a text box below the standard content of the form and enter your T&C's in the box
5. Save the file and upload it to ByD and publish the new version.
If you use the "Preview" button in ByD it will immediately use the new template, so you can check existing documents to check the new template.
I recommend doing this in a test system first and after you're happy with the result upload it into a Prod system.
Let me know in case you need additional information.
Cheers,
Manuel