Which requirements must be met so that a farm trailer is exempt from registration?

Your answer is correct because, according to German traffic rules, a farm trailer can be exempt from registration if it meets two main conditions: first, it must only be towed by truck tractors or self-propelled working machines and not driven faster than 25 km/h; second, it must be used exclusively for agricultural or forestry purposes. These conditions ensure that the trailer is used in a controlled, specialized environment, limiting its impact on public roads. The third option about an official test every 12 months applies to registered trailers, so it does not apply to exempt farm trailers. Understanding these specific criteria helps you know when certain vehicles are subject to registration and inspections.