1. The guarantor referred to in Article 59(1)(b) must be a third person established in the customs territory of the Community. The guarantor must be approved by the customs authorities requiring the guarantee, unless the guarantor is a credit institution, financial institution or insurance company accredited in the Community in accordance with Community provisions in force.
2. The guarantor shall undertake in writing to pay the secured amount of import or export duty corresponding to a customs debt and other charges.
3. The customs authorities may refuse to approve the guarantor or the type of guarantee proposed where either does not appear certain to ensure payment within the prescribed period of the amount of import or export duty corresponding to the customs debt and of other charges.