On 23 October 2025 IAB Tech Lab opened public comment on H2 2025 Global Privacy Platform updates: four new U.S. state sections and a rearchitected state-string layout with explicit section headers. That is not a CMP banner story. It is a wire-format story. The same month, traffickers still paste TC Strings into gpp , leave us_privacy=1YNN on CM360 pixels that expect GPP National, and ship OpenRTB bids where regs.gpp_sid survives a hop but regs.gpp does not. Every one of those URLs can look "privacy complete" in a spreadsheet while the downstream callee runs the wrong decoder.

This sheet is for ad ops and bid engineers who own the live tag URL, the Floodlight path, or the OpenRTB regs object and need one place to map parameter name → grammar → where it must land .…