This Arrangement shall continue in effect indefinitely but
either of the Governments may, on or before the 30th day of June in
any calendar year after the year 1950, give notice of termination
to the other Government and, in such event, this Arrangement shall
cease to be effective
(a) In the United Kingdom:
as respects income tax for any year of assessment beginning on
or after the 6th April in the calendar year next following that in
which the notice is given; as respects sur- tax, for any year of
assessment beginning on or after the 6th April in the calendar year
in which the notice is given; and as respects profits tax, in
respect of the following profits-
(i) profits arising in any chargeable accounting period
beginning on or after the 1st April in the calendar year next
following that in which the notice is given;
(ii) profits attributable to so much of any chargeable
accounting period falling partly before and partly after that date
as falls after that date;
(iii) profits not so arising or attributable by reference to
which income tax is chargeable for any year of assessment beginning
on or after the 6th April in that next following calendar year;
(b) In Grenada:
as respects income tax (including surtax) for any year of assessment beginning on or after the first day of January in the calendar year next following that in which such notice is given.