b) foere et regnskab, som giver toldmyndighederne mulighed for at foretage den kontrol, som de maatte skoenne noedvendig vedroerende den faktiske anvendelse af de paagaeldende varer til det foreskrevne saerlige formaal samt opbevare dette regnskab.
(b) to keep records enabling the customs authorities to carry out any checks which they consider necessary to ensure that the goods are actually put to the prescribed end-use, and to retain such records.