Article 13

The amount of any contribution due under Article 12 and which is in arrears shall bear interest at a rate which shall be determined in accordance with the Internal Regulations of the Fund, provided that different rates may be fixed for different circumstances.

Each Contracting State shall ensure that any obligation to contribute to the Fund arising under this Convention in respect of oil received within the territory of that State is fulfilled and shall take any appropriate measures under its law, including the imposing of such sanctions as it may deem necessary, with a view to the effective execution of any such obligation, provided however, that such measures shall only be directed against those persons who are under an obligation to contribute to the Fund.

Where a person who is liable in accordance with the provisions of Articles 10 and 12 to make contributions to the Fund does not fulfil his obligations in respect of any such contribution or any part thereof and is in arrear, the Director shall take all appropriate action against such person on behalf of the Fund with a view to the recovery of the amount due. However, where the defaulting contributor is manifestly insolvent or the circumstances otherwise so warrant, the Assembly may, upon recommendation of the Director, decide that no action shall be taken or continued against the contributor.