6.Where butter is offered to intervention in a Member State other than that in which it was produced, buying-in shall be subject to the presentation of a certificate supplied by the competent body of the Member State of production.
The certificate shall be presented to the competent body of the purchasing Member State not later than 35 days after the day on which the offer was received or after the closing date of the tender and shall contain the information referred to in Article 28(1)(a), (b) and (d) of this Regulation, and a confirmation that the butter has been produced directly and exclusively from pasteurised cream within the meaning of Article 6(2) of Regulation (EC) No 1234/2007, in an approved undertaking in the Community.