Del. Code tit. 21, § 2108

The registration card issued for a vehicle required to be registered under this title shall at all times, while the vehicle is being operated upon a highway within this State, be in the possession of the operator thereof or carried in the vehicle and subject to inspection by any peace officer. However, an operator shall be allowed 24 hours to produce the registration card before a conviction can be obtained under this provision, such registration having been legally issued at a time prior to such operator’s arrest.