However, the customs authorities may refuse to accept the form of guarantee chosen where it is incompatible with the proper functioning of the customs procedure concerned.
Féadfaidh na húdaráis chustaim, áfach, diúltú don fhoirm ráthaíochta a roghnaítear i gcás ina mbeidh sí ar neamhréir le feidhmiú cuí an nós imeachta custaim lena mbaineann.