Grass trimmers, brush cutters and brush saws shall be provided with a power switch having alock-off device such that at least two separate and dissimilar actions are required before driveto the cutting means or cutting accessory is possible. It shall not be possible to achievethese actions with a single grasping motion or a straight line motion within any graspingsurface identified in accordance with 8.14.2 a).Drive to the cutting means or cutting accessory shall only be enabled when the lock-offdevice is operated prior to the power switch.It shall not be necessary to sustain the actuation of the lock-off device until the power switchis activated, provided:– the power switch or an operator presence sensor (if any) is activated within 5 s of therelease of the lock-off device; and– there is a visual or audible indication as soon as the lock-off actuator is released andcontinues at least until the power switch or operator presence sensor (if any) isactivated;or– an operator presence sensor (if any) is activated prior to the release of the actuator ofthe lock-off device.NOTE 101 The visual or audible indication is intended to only indicate the state of the machine.After the power switch is released, the machine shall return to the original locked state (i.e.at least two separate and dissimilar actions are required before drive to the cutting means orcutting accessory is possible)– within 5 s; or– no later than when the cutting means or cutting accessory has come to a completestop,whichever is longer, unless