19 U.S.C. § 4391: Allocation and training of personnel

employs sufficient personnel who have expertise in, and responsibility for, preventing and investigating the entry of covered merchandise into the customs territory of the United States through evasion; on the basis of risk assessment metrics, assigns sufficient personnel with primary responsibility for preventing the entry of covered merchandise into the customs territory of the United States through evasion to the ports of entry in the United States at which the Commissioner determines potential evasion presents the most substantial threats to the revenue of the United States; and provides adequate training to relevant personnel to increase expertise and effectiveness in the prevention and identification of entries of covered merchandise into the customs territory of the United States through evasion.