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

To be exempt from registration according to German traffic rules, a farm trailer must meet specific conditions. The first condition is that it can only be towed by truck tractors or self-propelled working machines at a maximum speed of 25 km/h. This helps ensure safety when used in agricultural settings where high speeds are not necessary.

The second condition stipulates that the trailer must only be utilized for agricultural or forestry purposes. This restriction aligns with the idea that farm trailers serve specific functions related to agriculture and should not be used for general transportation, which would require registration.

The third option, which is not included in the correct combination, requires the trailer to undergo an official test (Hauptuntersuchung) every 12 months. This requirement typically does not apply to trailers that are exempt from registration, as such tests are more relevant for registered vehicles to ensure roadworthiness.

Understanding these criteria helps delineate when a farm trailer can operate without registration, supporting compliance with safety regulations in agricultural operations.