National approvals are valid only in the country where the certificate of approval is issued.
In Italy, the legislature has prescribed certain derogations and procedures that may be used as alternatives to national approval:
Limited approval for small batches: where the limited number of machines is sufficient to justify (technically and financially) the omission of certain tests
(For farm machinery: 250 units per calendar year per type)
Temporary approval: when the requested derogation, in relation to vehicles, is deemed necessary for experimental reasons
Vehicles that have achieved EU approval are, however, required to undergo further national tests and checks in order to ensure road traffic safety. This operation is referred to as 'transfer of EU approval'.