Exchange of Notes constituting an Agreement between the Government of the Kingdom of the Netherlands and the Government of the Federal Republic of Germany terminating the Convention between the Kingdom of the Netherlands and the Federal Republic of Germany on social security supplementary to community regulations, concluded at Berlin on 18 April 2001, and the Agreement between the Kingdom of the Netherlands and the Federal Republic of Germany concerning the collection of social security contributions, concluded at the Hague on 21 January 1969