The AREX service is used for the purpose of submitting declarations for goods entering or leaving the Community through Finland, as well as for submitting declarations for third country goods that have been in temporary storage and are to be reloaded.
The Goods entering the EU must be declared by pre-arrival declarations, and the Goods leaving the EU must be declared by pre-departure declaration. Both documents should be submitted electronically, within the timelines, set out by customs legislation.