zollrechtlichen
Zollrechtlichen is the declined form of the German adjective zollrechtlich, meaning relating to customs law. It is used to describe provisions, procedures, or matters that fall under the field of Zollrecht, i.e., the law governing customs duties, border controls, and related regulatory procedures. The form zollrechtlichen appears when the adjective modifies a plural or requires the -en ending, for example die zollrechtlichen Vorschriften or in zollrechtlichen Angelegenheiten.
Zollrecht covers tariffs, classification, origin, valuation, and procedures for import and export, as well as enforcement
Usage of the term is common in legal, administrative, and professional discourse on trade and border control.