If the offender is over the age of 18 and the offense consists of selling, furnishing or giving such controlled substances as enumerated in Schedules I, II, III, IV and V to a person who has not attained the age of 18 years the offender shall be guilty of a Class A felony. The imposition or execution of sentence shall not be suspended and probation shall not be granted.
Ala. Code § 13A-12-215 (1975)