Delaware Code
Subchapter XII. Operation of Bicycles and Other Human-Powered Vehicles; Operation of Electric Personal Assistive Mobility Devices
§ 4194. Passengers and trailers.

(a) No bicycle shall be used to carry more persons at 1 time than the number for which it is designed or equipped, except that an adult rider may carry a child securely attached to the person in a backpack or sling.
(b) A trailer or semitrailer designed for attachment to a bicycle may be used when securely attached thereto.