The ASTM (American Society of Testing Materials) F2040 safety standard for nonmotorized recreational snow sports is more stringent than the ECC (European Economic Community) CE 1077 safety standard for alpine skiing and snowboarding. Both organizations describe retention system strength and roll-off tests, but their impact test differences are notable:
As explained in the section regarding the procedures for the EN1077 testing the ECC testing includes dropping the ski/snowboard helmet at a speed of 5,42 m/s onto a flat anvil, and the peak acceleration of the impact cannot exceed 250 g.
ASTM testing drops the ski/snowboard helmet at a speed of 6,2 m/s onto a flat anvil, and at a lower speed onto a hemispherical and edge shaped anvil. Peak acceleration of the impacts can not exceed 300 g.
Major requirements a ski and snowboard helmet needs to surpass the ASTM F2040 certification: Retention system, Roll-off system and impact test.