No license shall be issued under § 20-64-203 unless and until the applicant therefor has furnished proof satisfactory to the Secretary of the Department of Health:
No license shall be granted to any person who has within five (5) years been convicted of a willful violation of any law of the United States, or of any state, relating to opium, coca leaves, or other narcotic drugs, or to any person who is a narcotic drug addict.
The secretary may suspend or revoke any license for cause.
Ark. Code § 20-64-204