For the purposes of paragraphs 11 and 12, the attestation to be given shall, in respect of each contract for the payment, be valid for at least one year but for not more than three years from the date of issue and shall contain the following information: (a) proof of the receiving company's residence for tax purposes and, where necessary, the existence of a permanent establishment certified by the tax authority of the Member State in which the receiving company is resident for tax purposes or in which the permanent establishment is situated; ...
