KRS 311.250

No itinerant medical company of two (2) or more persons shall travel as a troupe or company as vendors of any drug, nostrum, or instrument intended for the treatment of any disease or injury, or by any writing or printing profess to the public to treat disease or deformity by the use of any drug, nostrum, or instrument without first obtaining a license from the secretary for health and family services. The fee for such license shall be one hundred dollars ($100) per month. The secretary shall issue licenses to reputable and worthy applicants upon payment of the fee each month, but may for sufficient cause refuse to issue such license.