The word traficarán is the future form of traficar in the third person plural.
See the full traficar conjugation

traficar

Éstos debían incluir los cometidos por quienes fabricaran, importaran, exportaran, poseyeran y utilizaran explosivos o traficaran con ellos sin la licencia requerida o su equivalente;
Such offences should include offences applicable to those who manufacture, import, export, possess, use or traffic in explosives without the required licence or equivalent;
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