<P> Notably, the prohibition against owning a firearm by a person found to be a danger to himself or others or persistently or acutely disabled or gravely disabled continues in effect even after the expiration of the mental health court order itself (365 days). Instead, a person whose right to possess a firearm was forfeited as part of a mental health order must have that right judicially restored by filing a petition with the court requesting a hearing and a court order restoring the right to possess a firearm . </P> <P> Arizona appellate courts have ruled that ARS 1 - 244 bars the retroactive application of changes to the prohibited possessor statute unless there is an express legislative declaration of retroactive intent . Although the statute has been amended numerous times during its history, no such retroactive declarations have ever been passed into law . Thus, the possession of deadly weapons by some individuals may be governed by older versions of the statute which are either more or less restrictive than the one currently in force . For example, persons found to constitute a danger to self or others or to be persistently or acutely disabled or gravely disabled prior to September 30, 2009 do not need to petition the courts for a restoration of rights, as statutes in effect prior to that date either did not prohibit their possession of deadly weapons or prohibited such possession only temporarily, during their term of court - ordered treatment . </P> <P> State law prohibits the possession certain types of firearms and other deadly weapons by any citizen . These weapons are defined as follows: </P> <Ul> <Li> An item that is a bomb, grenade, rocket having a propellant charge of more than four ounces is an explosive, incendiary or poison gas, or any combination of parts or materials that is designed and intended for use in making such or converting a device into such, unless it has been classified as a "curio or relic" under federal law, or is registered under the federal National Firearms Act . </Li> <Li> A device that is designed, made or adapted to muffle the report of a firearm, unless it has been classified as a "curio or relic" under federal law, or is registered under the federal National Firearms Act . </Li> <Li> A firearm that is capable of shooting more than one shot automatically, without manual reloading, by a single function of the trigger, unless it has been classified as a "curio or relic" under federal law, or is registered under the federal National Firearms Act . </Li> <Li> A rifle with a barrel length of less than sixteen inches, or a shotgun with a barrel length of less than eighteen inches, or any firearm that is made from a rifle or shotgun and that, as modified, has an overall length of less than twenty - six inches, unless it has been classified as a "curio or relic" under federal law, or is registered under the federal National Firearms Act . </Li> <Li> An instrument, including a nunchaku, that consists of two or more sticks, clubs, bars or rods to be used as handles, connected by a rope, cord, wire or chain, in the design of a weapon used in connection with the practice of a system of self - defense . </Li> <Li> A breakable container that contains a flammable liquid with a flash point of one hundred fifty degrees Fahrenheit or less and that has a wick or similar device capable of being ignited, or any combination of parts or materials that is designed and intended for use in making such or converting a device into such . </Li> <Li> A chemical or combination of chemicals, compounds or materials, including dry ice, that is possessed or manufactured for the purpose of generating a gas to cause a mechanical failure, rupture or bursting or an explosion or detonation of the chemical or combination of chemicals, compounds or materials . </Li> <Li> An improvised explosive device, or any combination of parts or materials that is designed and intended for use in making such or converting a device into such . </Li> </Ul>

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