Governance Policy — ATA 00 Chapter: GENERAL Status: Scaffold Ready Last Updated: 2026-01-27 Default Baseline Policy Baseline Types Type Code Description Functional Baseline FBL Approved system requirements Design Baseline DBL Approved design definition Product Baseline PBL Approved as-built configuration Change Authority Change Type Authority Approval Gate Requirements System Engineer PDR Design Design Lead CDR Configuration Config Manager TRR Approval Gates PDR — Preliminary Design Review CDR — Critical Design Review TRR — Test Readiness Review FRR — Flight Readiness Review