Notwithstanding the provisions of subparagraph (a) of this
paragraph, the Administration may allow exclusion from the application
of this regulation to any diesel engine which is installed on a ship
constructed, or on a ship which undergoes a major conversion, before
the entry into force of the present Protocol, provided that the ship
is solely engaged in voyages to ports or offshore terminals within
the State of the flag of which the ship is entitled to fly.