32 C.F.R. § 1618.4 Transmission of orders and other official papers to registrants.
Title 32 - National Defense
Personnel of the Selective Service System will transmit orders or other official papers addressed to a registrant by handing them to him personally or mailing them to him to the current mailing address last reported by him in writing to the Selective Service System.
Title 32: National Defense
PART 1618—NOTICE TO REGISTRANTS
§ 1618.4 Transmission of orders and other official papers to registrants.

