ISO/TS 15077 gives the preferred method of operation, together with recommendations and requirements for the actuation, displacement and location, of operator controls installed on tractors and self-propelled machinery used in agriculture and forestry. It provides design guidance on actuation forces for hand and foot controls in relation to their displacement, frequency of use and location, and is applicable to the typical operation of these tractors and self-propelled machines by upright-seated operators. It is not applicable to powered lawn and garden equipment, nor to purpose-built forestry machines as defined in ISO 6814.