AS/NZS 62841.4.3:2021 applies to the design of pedestrian controlled walk-behind cylinder lawnmowers; and rotary lawnmowers equipped with metallic cutting means; and/or rigid non-metallic cutting means; and/or non-metallic cutting means with one or more cutting elements pivotally mounted on a generally circular drive unit, where these cutting elements rely on centrifugal force to achieve cutting, and have a kinetic energy for each single cutting element of greater than 10 J.