Restriction on posting articles of merchandise

No foreign postal packet except a letter packet, “small packet”, or parcel having affixed thereto or accompanied by a label or declaration (as the case may be) or except a sample packet, shall contain any goods or articles of merchandise, provided that nothing herein contained shall be deemed to prohibit or restrict the carrying by post of any printed paper packet, commercial paper packet, or any article for the blind, which conforms with these Regulations.