Who is prohibited from owning a firearm in Utah?

Some possible incorrect explanations are

• Persons under 18 are allowed to own a firearm in Utah. This is incorrect because federal law states that the minimum age to purchase a firearm from a licensed dealer is 21. However, there are certain exceptions for those between 18 and 21, such as if they are prior or active military or law enforcement.
• Persons convicted of a felony are not prohibited from owning a firearm in Utah. This is incorrect because it is a federal offense for a convicted felon to possess a firearm. However, some states may have differing laws and may allow certain felons, such as non-violent offenders, to legally possess a firearm after a certain amount of time has passed.
• Persons dishonorably discharged from the Armed Forces are not prohibited from owning a firearm in Utah. This is incorrect because federal law prohibits those who have been dishonorably discharged from possessing a firearm. However, there are certain exceptions for those who have been dishonorably discharged due to mental illness or substance abuse.