Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Ịgafe: Klas nke 9. Ụlọ nkwakọba ihe, nke a maara dị ka ụlọ ahịa na-enweghị ụtụ isi, eji ere, maka iji ya na mpụga nke mpaghara Customs, ahịa ndị na-enweghị ụtụ isi nke onye nwe ya nwere ma ọ bụ rere ya ma nyefee ya site na ụlọ nkwakọba ihe nke klas 9 gaa n'ọdụ ụgbọ elu ma ọ bụ ebe ọpụpụ ọzọ maka mbupụ site na, ma ọ bụ n'aha, ndị mmadụ na-apụ na mpaghara Customs maka ebe ndị ọzọ na-abụghị mpaghara azụmaahịa mba ofesi. N'okpuru 19 U.S.C. 1555 (b) (8) (C), ala ụtụ isi, maka ebumnuche nke ụlọ nkwakọba ihe na-enweghị ụtụ isi, pụtara mpaghara ụtụ isi nke United States dị ka akọwara ya na 101.1 (e) nke isiakwụkwọ a, yana mpaghara azụmaahịa mba ofesi (lee akụkụ 146 nke isiakwụkwọ a). All nkesa n'ụlọ nkwakọba na-eji nanị na-enye onye duty-free ahịa ebe na nchekwa cribs na conditionally duty-free ahịa na-Class 9 n'ụlọ nkwakọba.Ọzọkwa, na US ụfọdụ duty-free ụlọ ahịa ga-ere ha ngwongwo anụ ụlọ njem na kwesịrị ekwesị ụtụ isi gụnyere. A na-ejedebe mmanya na ngwaahịa ụtaba na ndị njem mba ụwa naanị ma dabere na njedebe afọ nke 18 na 21 n'otu n'otu, ọ bụ ezie na afọ onye ga-ebubata ngwaahịa ndị a na mba ndị ọzọ nwere ike ịdị ala.  Ajụjụ: Afọ ole ka mmadụ ga-adị tupu ya enwee ike ibubata ụtaba n'ụgbọelu mba ụwa?
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