This Agreement shall remain in force until terminated by a Contracting State.  Either Contracting State may terminate the Agreement, through diplomatic channels,  by giving notice of termination at least six months before the end of any calendar  year. In such event, the Agreement shall cease to have effect:

a) in respect of taxes withheld at source to amounts derived on or after the  first of January in the calendar year next following the year in which the notice is  given; 

b) in respect of other taxes on income, and taxes on capital, to taxes  chargeable for any taxable year beginning on or after first of January in the calendar  year next following the year in which the notice is given.