Fireworks laws in Massachusetts

Section 39. No person shall sell, or keep or offer for sale, or have in his possession, or under his control, or use, or explode, or cause to explode, any combustible or explosive composition or substance, or any combination of such compositions or substances, or any other article, which was prepared for the purpose of producing a visible or audible effect by combustion, explosion, deflagration, or detonation.
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For the purposes of this section the word ''fireworks'' shall include compositions, substances or other articles and shall also include blank cartridges or toy cannons in which explosives are used, the type of toy balloon which requires fire underneath to propel the same, firecrackers, cherry bombs, silver salutes, M–80's, torpedoes, sky-rockets, Roman candles, sparklers, rockets, wheels, colored fires, fountains, mines, serpents, or other fireworks of like construction or any fireworks containing any explosive or flammable compound, or any tablets or other device containing any explosive substance.
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The term ''fireworks'' as used herein shall not include toy pistols, toy canes, toy guns or other devices in which paper caps or plastic caps containing twenty-five hundredths grains or less of explosive compound are used, if they are so constructed that the hand cannot come in contact with the cap when in place for the explosion, or toy pistol paper caps or plastic caps which contain less than twenty hundredths grains of explosive mixture, the sale and use of which shall be permitted at all times; and provided, further, that this section shall not apply (1) to the sale of any fireworks to be shipped directly out of the commonwealth, or (2) to the sale of any such article for the use of, and its use by, persons having obtained a permit for a supervised display of such fireworks from the marshal or some officer designated by him therefor, under any provision of section thirty-nine A, or (3) to the sale of flares, lanterns or fireworks for the use of, and their use by, railroads, railways, boats, motor vehicles or other transportation agencies, or other activity, lawfully permitted or required to use any or all of such articles for signal purposes, illumination or otherwise, or (4) to the sale or use of blank cartridges for a duly licensed show or theatre or for signal or ceremonial purposes in athletics or sports, or to the sale of special blank cartridges and their use in the proper operation of industrial tools and equipment only, or (5) to experiments at a factory for explosives, or (6) to the sale of blank cartridges for the use of, or their use by, the militia or any organization of war veterans or other organizations authorized by law to parade in public, a color guard armed with firearms, or (7) in teaching the use of firearms by experts, or (8) to the sale of shells for firearms, cartridges, gunpowder, and for the purpose of using, and their use, or in connection with the hunting of game or in target practice with firearms, or (9) to farmers and fruit growers who, having obtained a permit under section thirteen of chapter forty-eight, use firecrackers for the control of damage to their crops by birds.

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: