Fireworks laws in Delaware

(a) A person may not store, sell, offer or expose for sale, or have in possession with intent to sell or to use, discharge or cause to be discharged, ignited, fired, or otherwise set in action within this State, any fireworks, firecrackers, rockets, torpedoes, Roman candles, fire balloons, or other fireworks or substances of any combination designed or intended for pyrotechnic display; except after having obtained a permit pursuant to § 6903 of this title, except for agricultural use pursuant to § 6906 of this title, and except pursuant to subsection (c) of this section.
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(c) The term “fireworks” does not include toy pistols, toy canes, toy guns, or other devices in which paper caps manufactured in accordance with the United States Interstate Commerce Commission regulations for packing and shipping of toy paper caps are used and toy pistol paper caps manufactured as provided therein; wood stick or wire sparklers which produce a shower of sparks upon ignition and which consist of wire or stick coated with not more than 100 grams of pyrotechnic mixture per item; other hand-held or ground-based sparkling devices which are nonexplosive and nonaerial, which sometimes produce a crackling or whistling effect, and which contain 75 grams or less of pyrotechnic mixture per tube or a total of 500 grams or less for multiple tubes; snakes, glow worms, and smoke devices which contain 20 grams or less of pyrotechnic mixture; or trick noisemakers, which include party poppers, snappers, and drop pops, each containing 16 milligrams or less of pyrotechnic mixture.

(d) The sale of wood stick or wire sparklers which produce a shower of sparks upon ignition and which consist of wire or stick coated with not more than 100 grams of pyrotechnic mixture per item; other hand-held or ground-based sparkling devices which are nonexplosive and nonaerial, which sometimes produce a crackling or whistling effect, and which contain 75 grams or less of pyrotechnic mixture per tube or a total of 500 grams or less for multiple tubes; snakes, glow worms, and smoke devices which contain 20 grams or less of pyrotechnic mixture; or trick noisemakers, which include party poppers, snappers, and drop pops, each containing 16 milligrams or less of pyrotechnic mixture excepted under subsection (c) of this section is limited to persons 18 years of age and older during a 30-day period prior to and including the days of allowed use of these items, and the use of these items shall be limited to July 4, the third day of Diwali, December 31, and January 1 of each year.

Division 1.4 consists of explosives that present a minor blast hazard. Examples are common fireworks, toy caps, empty primed grenades, and some small arms ammunition.
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341.2 Mailability, Packaging, and Marking
Explosives are generally prohibited from being mailed under 18 U.S.C. § 1716. The following conditions apply for mailing Hazard Class 1 items:
International Mail : All explosives are prohibited.
Domestic Mail via Air Transportation: All explosives are prohibited.
Domestic Mail via Surface Transportation: Generally, explosives are prohibited, with exceptions for Division 1.4S toy propellant devices and safety fuses that have been approved by the director, Product Classification before mailing (refer to 214 for contact information). A shipping paper is required.

UPS Prohibited Items
Examples of items prohibited by UPS include, but are not limited to the following:
Shipments prohibited by law
Bank bills, notes or currency
Common fireworks

We do not accept for delivery:
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Fireworks
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FedEx accepts certain classes and divisions of hazardous materials for transport. Before you ship, please refer to the following list to ensure your packages contain only accepted hazardous materials.
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1.4 1
Explosives
1.4/Explosive 1.4
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1 Except fireworks.

§ 1500.17 Banned hazardous substances.
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(3) Fireworks devices intended to produce audible effects (including but not limited to cherry bombs, M-80 salutes, silver salutes, and other large firecrackers, aerial bombs, and other fireworks designed to produce audible effects, and including kits and components intended to produce such fireworks) if the audible effect is produced by a charge of more than 2 grains of pyrotechnic composition; except that this provision shall not apply to such fireworks devices if all of the following conditions are met:
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(8) Firecrackers designed to produce audible effects, if the audible effect is produced by a charge of more than 50 milligrams (.772 grains) of pyrotechnic composition (not including firecrackers included as components of a rocket), aerial bombs, and devices that may be confused with candy or other foods, such as “dragon eggs,” and “cracker balls” (also known as “ball-type caps”), and including kits and components intended to produce such fireworks except such devices which meet all of the following conditions:
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(9) All fireworks devices, other than firecrackers, including kits and components intended to produce such fireworks, not otherwise banned under the act, that do not comply with the applicable requirements of part 1507 of this chapter, except fireworks devices which meet all the following conditions: