Artikel 20

1. The requirements of the Organization shall be financed:
(a) as to the Administrative part of the Budget, by cash contributions from Member States, which shall be due at the beginning of the financial year to which they relate and shall be paid promptly;
(b) as to the Operational part of the Budget, by contributions in cash, in kind or in services from Member States, other States, international organizations, governmental or non-governmental, other legal entities or individuals, which shall be paid as early as possible and in full prior to the expiration of the financial year to which they relate.
2. Member States shall contribute to the Administrative part of the Budget of the Organization at a rate agreed to by the Council and by the Member State concerned.
3. Contributions to the operational expenditure of the Organization shall be voluntary and any contributor to the Operational part of the Budget may stipulate with the Organization terms and conditions, consistent with the purposes and functions of the Organization, under which its contributions may be used.
4. (a) All Headquarters administrative expenditure and all other administrative expenditure except that incurred in pursuance of the functions outlined in paragraph 1 (c) and (d) of Article 1 shall be attributed to the Administrative part of the Budget;
(b) all operational expenditure and such administrative expenditure as is incurred in pursuance of the functions outlined in paragraph 1 (c) and (d) of Article 1 shall be attributed to the Operational part of the Budget.
5. The Council shall ensure that the management is conducted in an efficient and economical manner.