Weather, other radio usage, disruption of the signal over distance, mountains/high hills enclosing reciever/ transmitter. Views.
Illinois requires nail technicians to be a minimum of 16. Applicants must complete high school or be older than the age of compulsory school attendance, according to the Illinois Joint Committee on Administrative Rules.
Every state does require that nail technicians be licensed (requirements vary by state). You can obtain your license after graduation by taking an exam that includes both a written and a practical portion.