Final answer:
According to 14 CFR part 48, a small UA owner would not be permitted to register it if it is intended to be used exclusively for hobby or recreational purposes and weighs less than 0.55 pounds.
Step-by-step explanation:
According to 14 CFR part 48, a small UA (unmanned aircraft) owner would not be permitted to register it if the UA is intended to be used exclusively for hobby or recreational purposes and weighs less than 0.55 pounds (250 grams). Hobby or recreational small UAs that weigh more than 0.55 pounds must be registered, but registration is free and can be done online. However, small UAs that are used for any purpose other than hobby or recreational, or weigh more than 55 pounds (about 25 kilograms), must be registered and operated under different rules.