By making a declaration under Article 39(1)
(b), a Contracting State can preserve its local
law rights of arrest and detention for nonpayment
of charges for public services related
to an aircraft object or, as will be discussed
later, ‘another object’, without registering these
rights in any registry but with the transparency
of the UNIDROIT category publication
system of such declarations under Article 23
described in the next paragraph.