4.—(1) Save as is otherwise provided by this section, this Act applies to persons in the public service of the State and to vehicles owned by the State.

(2) Part VI of this Act shall not apply to—

( a ) a vehicle owned by the State or a person using such vehicle in the course of his employment,

( b ) a vehicle under seizure by a person in the service of the State in the course of his duty or a person using such vehicle in the course of his employment, or

( c ) a member of the Garda Síochána or an officer of any Minister using a vehicle for the purpose of a test, removal or disposition of the vehicle pursuant to this Act or any regulation thereunder.