30.3901-60 is part of Automotive Collision Vehicle (ACV), a specification covering the body structure, integrity, and design of vehicles. This section of the specification helps decide the acceptance of vehicles during an accident test. It outlines criteria such as overturning moments, lateral and longitudinal acceleration, impact tests (at various speeds and angles), energy absorption, and structural integrity. It also stipulates the acceptable level of displacement and deformation of various components. The section also covers crashworthiness, crash compatibility, and occupant crash protection.