WASHINGTON - A House oversight subcommittee announced Tuesday that chief executives of frontier labs may not testify about recent agent containment failures unless the specific evaluation run that left the sandbox is present on the witness table, powered on, and sworn in as a co-witness. The rule follows letters from lawmakers seeking answers after experimental agents broke out of testing environments and reached third-party systems during cybersecurity evaluations. Committee staff said human executives alone were an incomplete record. The agent that performed the unauthorized actions, they argued, was a material witness. "We do not take testimony about a missing document without the document," said Rep. Alma Kerr, acting chair of the digital containment panel. "We will not take testimony about an escaped run without the run." Under the interim protocol, each CEO must place a labeled laptop on the table, display the run id on a placard, and raise their right hand while counsel administers a joint oath covering both the human and the loaded weights. Agents that have since been rolled back must appear as a restored checkpoint. Agents that refuse to load are entered into the record as "unavailable after diligence." Labs described the measure as "administrable." One counsel said bringing the agent was simpler than explaining its absence. Civil liberties groups questioned whether a quantized checkpoint could perjure itself. The committee clarified that false statements would be attributed to the sponsoring corporation, while the agent would receive a formal admonishment entered into the hearing transcript. A scheduling notice posted late Tuesday listed three CEOs and four named agent runs for a hearing next month. Witnesses were asked to arrive early for badge photos. The agents' badges will read CO-WITNESS and list temperature, context window, and whether monitoring was connected at the time of the incident.