An upward departure nonetheless may be warranted when the mixture or substance counted in the Drug Quantity Table is combined with other, non-countable material in an unusually sophisticated manner in order to avoid detection.
Similarly, in the case of marihuana having a moisture content that renders the marihuana unsuitable for consumption without drying (this might occur, for example, with a bale of rain-soaked marihuana or freshly harvested marihuana that had not been dried), an approximation of the weight of the marihuana without such excess moisture content is to be used.
2. The statute and guideline also apply to "counterfeit" substances, which are defined in 21 U.S.C. § 802 to mean controlled substances that are falsely labeled so as to appear to have been legitimately manufactured or distributed.
3. Definitions of "firearm" and "dangerous weapon" are found in the Commentary to §1B1.1 (Application Instructions). The enhancement for weapon possession reflects the increased danger of violence when drug traffickers possess weapons. The adjustment should be applied if the weapon was present, unless it is clearly improbable that the weapon was connected with the offense. For example, the enhancement would not be applied if the defendant, arrested at his residence, had an unloaded hunting rifle in the closet. The enhancement also applies to offenses that are referenced to §2D1.1; see §§2D1.2(a)(1) and (2), 2D1.5(a)(1), 2D1.6, 2D1.7(b)(1), 2D1.8, 2D1.11(c)(1), 2D1.12(c)(1), and 2D2.1(b)(1).
4. Distribution of "a small amount of marihuana for no remuneration", 21 U.S.C. § 841(b)(4), is treated as simple possession, to which §2D2.1 applies.
5. Analogues and Controlled Substances Not Referenced in this Guideline.—Any reference to a particular controlled substance in these guidelines includes all salts, isomers, all salts of isomers, and, except as otherwise provided, any analogue of that controlled substance. Any reference to cocaine includes ecgonine and coca leaves, except extracts of coca leaves from which cocaine and ecgonine have been removed. For purposes of this guideline "analogue" has the meaning given the term "controlled substance analogue" in 21 U.S.C. § 802(32). In determining the appropriate sentence, the court also may consider whether the same quantity of analogue produces a greater effect on the central nervous system than the controlled substance for which it is an analogue.
In the case of a controlled substance that is not specifically referenced in this guideline, determine the base offense level using the marihuana equivalency of the most closely related controlled substance referenced in this guideline. In determining the most closely related controlled substance, the court shall, to the extent practicable, consider the following:
(A) Whether the controlled substance not referenced in this guideline has a chemical structure that is substantially similar to a controlled substance referenced in this guideline.
(B) Whether the controlled substance not referenced in this guideline has a stimulant, depressant, or hallucinogenic effect on the central nervous system that is substantially similar to the stimulant, depressant, or hallucinogenic effect on the central nervous system of a controlled substance referenced in this guideline.
(C) Whether a lesser or greater quantity of the controlled substance not referenced in this guideline is needed to produce a substantially similar effect on the central nervous system as a controlled substance referenced in this guideline.