There are strong suspicions among law enforcement that traffickers are increasingly using the TIR (UN Convention on International Transit) system to transport narcotics through Kazakhstan in seemingly sealed trucks.266 TIR trucks operate according to the international customs system and are not subject to customs control for tax purposes. The risk is that the seal can be tempered with and drugs placed (and removed) at any point during the trajectory. If customs has reasonable suspicion and no drugs found are found upon inspection, the concerned law-enforcement agency will bear all expenses and reimburse all damages incurred by the transporter
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