An unbraked trailer, the permissible weight of which does not exceed 750 kg, and which has not previously been registered abroad, will be submitted by the operator for technical inspection no later than:
2 years after the registration of this trailer and then regularly every 2 years .
6 years after the registration of this trailer and then regularly every 4 years .
4 years after the registration of this trailer and then regularly every 4 years .