The requirements provided in this standard are for powered walk-behind rotary tillers and hand-supported cultivators. This standard is intended to provide safety and design requirements to help ensure uniform operator environments@ exclusive of the power source. This standard shall apply to machines specifically marketed for consumer / personal use. This standard does not apply to commercial or agricultural machines or machines primarily for agricultural purposes such as defined in ANSI/SAE J1116 or SAE J1150. This standard does not apply to tractor mounted or drawn tillers or to cultivator attachments which are adaptations of@ or accessories to@ handheld string trimmers and brushcutters covered by the applicable ANSI/OPEI B175 standards. This standard is not intended to completely cover electrical requirements. The effective implementation date of this standard shall be two (2) years after the publication date and shall apply to all products built after that date. Manufacturers may also comply with the requirements of this standard anytime after the publication date.