CASR Part 25 was developed to specify the airworthiness standards for transport category aeroplanes.
CASR Part 23 was developed to specify the airworthiness standards for small aeroplanes: Normal category aeroplanes - not intended for acrobatic operation, having up to 9 passenger seats and a maximum takeoff weight up to 5,700 kg. Utility category aeroplanes - intended for limited acrobatic operation, having up to 9 passenger seats and a maximum takeoff weight up to 5,700 kg. Acrobatic cat…