SAD Guidelines - T51
Box 51: Intended offices of transit (and country)
Enter the code for the intended office of entry into each EFTA country to be crossed and the office of entry by which the goods re-enter the customs territory of the Community after having crossed the territory of an EFTA country, or, where the shipment is to cross a territory other than that of the Community or of an EFTA country, the office of exit by which the transport leaves the Community and the office of entry by which it re-enters the Community. in whose territory the transhipment is to be made.
Using the relevant Community code from Annex 38, enter the customs offices concerned.