ally ▁ob struct ▁a ▁const able ▁acting ▁in ▁the ▁exercise ▁of ▁their ▁powers ▁under ▁the ▁section ▁or ▁to ▁conce al ▁a ▁cor ros ive ▁subst ance ▁from ▁a ▁const able ▁when ▁being ▁searched ▁under ▁the ▁powers ▁given ▁in ▁this ▁section . ▁Am ending ▁the ▁Police ▁and ▁C riminal ▁Ev idence ▁( N or thern ▁Ireland ) ▁Order ▁ 1 9 8 9 ▁in ▁a ▁similar ▁way ▁to ▁the ▁am end ment ▁of ▁the ▁Police ▁and ▁C riminal ▁Ev idence ▁Act ▁ 1 9 8 4 , ▁as ▁detailed ▁above . ▁ ▁Part ▁ 2 ▁Allow ing ▁courts ▁to ▁make ▁a ▁kn ife ▁crime ▁prevent ion ▁order ▁without ▁passing ▁conv iction . ▁Est ab lish ing ▁requirements ▁for ▁the ▁applications ▁of ▁such ▁orders . ▁Allow ing ▁courts ▁to ▁make ▁a ▁kn ife ▁crime ▁prevent ion ▁order ▁with ▁conv ict ions . ▁Est ab lish ing ▁the ▁prov isions ▁and ▁requirements ▁of ▁kn ife ▁crime ▁prevent ion ▁orders . ▁ ▁Part ▁ 3 ▁Est ab lish ing ▁def ences ▁and ▁their ▁limitations ▁to ▁persons ▁charged ▁with ▁s elling ▁a ▁bl aded ▁article ▁to ▁a ▁person ▁under ▁the ▁age ▁of ▁ 1 8 . ▁Reg ulating ▁the ▁des patch ▁and ▁delivery ▁of ▁bl aded ▁products . ▁Def ining ▁that ▁a ▁" bl aded ▁product " ▁in ▁the ▁Act ▁means ▁an ▁article ▁which : ▁( a ) ▁is ▁or ▁has ▁a ▁bla de , ▁and ▁( b ) ▁is ▁capable ▁of ▁causing ▁a ▁serious ▁injury ▁to ▁a ▁person ▁which ▁involves ▁cutting ▁that ▁person ' s ▁skin .