▁en dem ically ▁unique ▁e cos ystem ▁free ▁of ▁several ▁severe ▁p ests ▁and ▁dise ases ▁that ▁are ▁present ▁in ▁many ▁parts ▁of ▁the ▁world . ▁If ▁other ▁products ▁are ▁brought ▁inside ▁along ▁with ▁p ests ▁and ▁dise ases , ▁it ▁would ▁damage ▁the ▁e cos ystem ▁seriously ▁and ▁add ▁millions ▁of ▁costs ▁in ▁the ▁local ▁agricult ural ▁business es . ▁ ▁Canada ▁There ▁are ▁three ▁quar antine ▁Act s ▁of ▁Parliament ▁in ▁Canada : ▁Qu ar antine ▁Act ▁( hum ans ) ▁and ▁Health ▁of ▁Anim als ▁Act ▁( anim als ) ▁and ▁Plant ▁Prote ction ▁Act ▁( ve get ations ). ▁The ▁first ▁legisl ation ▁is ▁enfor ced ▁by ▁the ▁Canada ▁Border ▁Services ▁Agency ▁after ▁a ▁complete ▁rewrite ▁in ▁ 2 0 0 5 . ▁The ▁second ▁and ▁third ▁legisl ations ▁are ▁enfor ced ▁by ▁the ▁Canadian ▁Food ▁In spe ction ▁Agency . ▁If ▁a ▁health ▁emer gency ▁exists , ▁the ▁Governor ▁in ▁Council ▁can ▁prohib it ▁import ation ▁of ▁anything ▁that ▁it ▁de ems ▁necessary ▁under ▁the ▁Qu ar antine ▁Act . ▁ ▁Under ▁the ▁Qu ar antine ▁Act , ▁all ▁trav ellers ▁must ▁submit ▁to ▁screen ing ▁and ▁if ▁they ▁believe ▁they ▁might ▁have ▁come ▁into ▁contact ▁with ▁communic able ▁dise ases ▁or ▁vectors , ▁they ▁must ▁disc lose ▁their ▁where about s ▁to ▁a ▁Border ▁Services ▁Officer . ▁If ▁the ▁officer ▁has ▁reasonable ▁grounds ▁to ▁believe ▁that ▁the ▁trav eller ▁is ▁or ▁might ▁have ▁been ▁inf ected ▁with ▁a ▁communic able ▁disease ▁or ▁refused ▁to ▁provide ▁answers ,