Where it is not possible to establish the precise amount, the guarantee shall be fixed at the maximum amount, as estimated by the customs authorities, of import or export duty corresponding to the customs debt and of other charges which have been or may be incurred.
I gcás nach féidir an méid beacht a shuíomh, socrófar an ráthaíocht ag méid uasta na dleachta ar allmhairí nó ar onnmhairí a fhreagraíonn don fhiach custaim agus do na muirear eile a thabhófar nó a fhéadfar a thabhú, is méid a mheasfaidh na húdaráis chustaim.