18 Del. Admin. Code § 602-4.0
An appraiser may prepare an appraisal or a repair estimate on a motor vehicle that has been damaged as a result of a covered loss either from the appraiser's personal inspection of the vehicle or from photographs, videos, or electronically transmitted digital imagery of the motor vehicle; provided, however, that no insurer may require an owner of a motor vehicle to submit photographs, videos, or electronically transmitted digital imagery as a condition of an appraisal. If the owner of a motor vehicle is not satisfied with an appraisal based upon photographs, videos, or electronically transmitted digital imagery of the motor vehicle, the owner of the motor vehicle may require an insurer to obtain an appraisal based on a personal inspection.
18 Del. Admin. Code § 602-4.0