A rider is a standard attachment a client staples to an existing contract. The ANA, the national association of advertisers, published a model AI contract rider because AI reached client-agency contracts faster than the lawyers did, and every client was improvising its own language. The model rider gives both sides a common starting point. It covers four things, and each exists for a reason you should be able to explain.
| what it requires | why it exists |
|---|---|
| Disclosure. The agency tells the client where AI touched the work, before being asked. | Clients answer to boards and regulators. A CMO surprised by an AI question in a board meeting becomes an agency's ex-client. |
| IP ownership. Who owns the outputs is settled in writing. | Ownership of model-generated work is legally murky, and clients want their campaigns owned clean, with no dispute waiting inside the brand assets. |
| Human oversight. A named human reviewed the work and warrants it. | Accountability needs a name attached. 'The model did it' is not a defense anyone will accept, so a person signs. |
| Training-data transparency. The agency knows, and can say, what the model learned from. | Procurement wants the inputs legal before the outputs run. This is the sleeper clause: it quietly shifts risk from client to agency, which is exactly why procurement loves it. |
Contract language is only half the layer; statutes are arriving behind it. New York's synthetic performer disclosure law took effect in June 2026: ads that use AI-generated performers must say so (New York State law, via trade coverage). New York is where the clients live, and disclosure laws travel, so the safe operating assumption is that more states follow. Tennessee's ELVIS Act and a wave of state likeness laws are already policing voice and image, and campaigns run in fifty states at once.
Nobody gets fired over a rough cut. People get fired, and agencies get sued, over an uncleared voice, an undisclosed synthetic performer, a likeness used without consent. The account person is the one in the room when the client says 'generate a spokesperson and skip the talent costs,' and the honest answer starts with this reading: skipping talent costs usually means trading talent costs for legal costs. You own the client, the calendar, and the money, so the rider's promises land on you, and Wednesday of Week 13 you will negotiate a scope with an AI clause inside it: disclosure, ownership of outputs, named human review. Know what each one costs before you give any of them away.