ISO 10968:2004 specifies requirements and guidelines for the operator's primary controls on earth-moving machinery (as defined in ISO 6165), in as far as those controls relate to the ride-on operator (for remote operator-controlled machines, see ISO 15817). Its provisions for finger-, hand- and foot-operated controls are not intended to prevent usage of other types of controls, control locations or control movements. Nevertheless, it does recommend that the general requirements and principles of arrangement be followed for those others, taking into account operator safety and ergonomics.