Del. Code tit. 20 § 3206
A participating political subdivision may request assistance of other participating political subdivisions or fire, rescue or emergency medical service provider organizations in preventing, mitigating, responding to and recovering from disasters that result in locally-declared emergencies or in concert with authorized drills or exercises as allowed under this chapter. Requests for assistance shall be made through the chief executive officer of a participating political subdivision or the chief executive officer's designee. Requests may either be verbal or in writing and are not required to go directly to the Director of the Delaware Emergency Management Agency but in all cases will be reported to the Director as soon as is practical. Verbal requests will be followed up with a written request as soon as is practical but in no event later than 15 days.
20 Del. C. § 3206