Refund of customs duty to feedingstuffs for zoo animals, laboratory and other animals

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https://www.bazg.admin.ch/content/bazg/en/home/informationen-firmen/einfuhr-in-die-schweiz/befreiungen-verguenstigungen-und-zollpraeferenzen_einfuhr/zollbeguenstigungen/rueckerstattung-der-zollabgaben-fuer-futtermittel-fuer-zoo_labor.html