12.—Any person arrested under section 11 of this Act or delivered to a member of the Garda Síochána under section 7 (1) of this Act shall, in addition—

(a) if the aircraft concerned is registered in a state to which Part II of the Act of 1965 applies and (if he is a citizen of Ireland) the extradition of the person is not prohibited by section 14 of that Act, be deemed to have been arrested pursuant to a warrant issued under section 27 of that Act, and

(b) if the aircraft concerned is registered in a place to which Part III of that Act applies, be deemed to have been arrested pursuant to a warrant issued under section 49 of that Act,

and section 15 of the Act of 1965 shall not apply in relation to the extradition of a person to whom this section applies.