A person convicted of a second or subsequent offense of violating section 4228, 4230, 4231, 4232, 4233, 4234, 4235, 4236 or 4237 of this title, except a violation of subdivision 4230(a)(1), shall be subject to a term of imprisonment or fined up to twice that authorized by those sections, or both. (Added 1989, No. 100, § 9.)