for five years from the day on which it
may come into operation; and if neither Party
shall, twelve months before the expiration
of the said period of five years give notice
of its intention to terminate its operation,
the Convention shall continue in force for
a year longer, and so from year to
year until the expiration of a year's
notice from either Party for its
termination.
The High Contracting Parties, however,
reserve to themselves the power of
making by common consent, in this
Convention, any modifications which
may not be inconsistent with its spirit
and principles, and which experience