Who authorizes cleared couriers to hand-carry classified materials on commercial flights?

The authority for cleared couriers to hand-carry classified materials on commercial flights lies with the Unit Commander. This responsibility includes ensuring that proper security measures and protocols are followed when transporting sensitive information. The Unit Commander has the oversight and accountability necessary to assess the mission requirements and the qualifications of the individuals involved in the transport of classified materials.

The other entities listed do not hold this specific responsibility in a direct operational capacity within the unit where the courier operates. The Chairman of the Joint Chiefs of Staff and the Defense Security Service are involved in broader oversight and security matters but do not authorize individual couriers. The Original Classification Authority is responsible for the classification of information but does not handle operational procedures for transporting classified materials. Thus, the Unit Commander plays a crucial role in the operational context of transporting classified materials securely.