d an offense for which a maximum term o f imprisonment of ten years or more is prescribed in the Controlled Substances Act (21 U.S.C. 801 et seq.), the Controlled Substances Import and Export Act (21 U.S.C. 951 et seq.), the Maritime Drug Law Enforcement Act (46 U.S.C. App. 1901 et seq.), an offense under section 924(c), 956(a), or 23321> o