Elegant Testing Agency(ETA) “Terms and Conditions” is the document governing the contractual relationship between the provider of a service and its user (Advertisement department). Terms and Conditions agreements (T&C) set out exactly what we will offer your Department and what we expect from them in return.Before we look at drafting a Terms and Conditions Agreement, let’s be clear on how we works. We’ll also look at how to make our T&C legally enforceable.