Except as provided in subsection (e) of this section, a person convicted of a subsequent crime under this title is subject to: a term of imprisonment twice that otherwise authorized; twice the fine otherwise authorized; or both. For purposes of this section, a crime is considered a subsequent crime, if, before the conviction for the crime, the offender has ever been convicted of a crime under this title or under any law of the United States or of this or another state relating to other controlled dangerous substances. A person convicted of a subsequent crime under a law superseded by this title is eligible for parole, probation, and suspension of sentence in the same manner as those persons convicted under this title. A sentence on a single count under this section may be imposed in conjunction with other sentences under this title. A person whose prior and subsequent convictions were for a violation of § 5–601, § 5–602, § 5–603, § 5–604, § 5–605, or § 5–606 of this title is subject to this section only if the person was also previously convicted of a crime of violence as defined in § 14–101 of this article.