This Convention shall remain in force until terminated by one of the Contracting States.  Either Contracting State may terminate the Convention, through diplomatic channels, by  giving notice of termination at least six months before the end of any calendar year following  after the period of five years from the date on which the Convention entered into force. In  such event, the Convention shall cease to have effect:  

a) in respect of taxes withheld at source, on income derived on or after 1st January of the  calendar year next following the year in which the notice of termination is given;  

b) in respect of other taxes on income and on property, for any taxable year beginning on  or after 1st January of the calendar year next following the year in which the notice of  termination is given.