In the headquarters agreement concluded with the country in whose territory the organization has its registered office, it is provided that that country grants advances if the working capital is not sufficient. The amount of such advances and the conditions under which they are granted shall be the subject of separate agreements between that country and the Organization. The audit shall be carried out by one or more countries of the Special Union or by external auditors in accordance with the Financial Regulation. They shall be appointed by the Assembly with their approval. Considering that the generalization of a single classification system for patents, inventors` certificates, utility models and utility models is in the general interest and that it can lead to closer international cooperation in the field of industrial property and contribute to the harmonization of national laws in this field, Article 24 of the Stockholm Act of the Paris Convention for the Protection of Industrial Property. The International Bureau shall carry out all other tasks entrusted to it. The budget of the special association shall be established taking due account of the needs of coordination with the budgets of the other trade unions managed by the organisation. Where these conditions apply only to certain types of protection or to certain fields of technology, the country concerned may make such a reservation only to the extent that the conditions are met. Administrative tasks related to the Special Union shall be entrusted to the International Bureau. The budget of the Special Association shall be financed from the following sources: A country in arrears in the payment of its dues may not exercise its right to vote in any institution of the Special Association if the amount of its arrears is equal to or greater than the amount of the contributions it has due for the previous two full years. . .