3.5 Colorado Controlled Substances Law & Marijuana Regulation

Colorado Controlled Substances Law & Marijuana Regulation

Sub-topic II.D Controlled Substances / Introduction to Marijuana (2 required hours) is the smallest law block in Unit II and one of the most frequently misapplied. Colorado's drug code was rewritten twice in six years — HB 19-1263 reduced most simple possession to a misdemeanor effective March 1, 2020, and HB 22-1326, the Fentanyl Accountability and Prevention Act, carved fentanyl back out effective July 1, 2022. POST requires the two-hour marijuana section to be delivered by an instructor who has completed the POST Marijuana Train-the-Trainer course or holds equivalent approved experience, which tells you how seriously the Board treats the subject.

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1. Colorado's Drug Offense Classification System

Colorado does not classify drug crimes as ordinary felonies and misdemeanors. Since 2013 it uses a parallel drug grid in C.R.S. 18-1.3-401.5 and 18-1.3-501(1)(d):

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2. Unlawful Possession — C.R.S. 18-18-403.5

+--------------------------------------------------------------------------+
|  SCHEDULE I / II  (cocaine, methamphetamine, heroin, MDMA, etc.)          |
|     4 grams or less .......................... LEVEL 1 DRUG MISDEMEANOR   |
|     more than 4 grams ........................ LEVEL 4 DRUG FELONY        |
|     4th or subsequent DM1 possession ......... LEVEL 4 DRUG FELONY        |
+--------------------------------------------------------------------------+
|  SCHEDULE III / IV / V  (any quantity) ....... LEVEL 1 DRUG MISDEMEANOR   |
|     EXCEPT flunitrazepam, ketamine, GHB,                                  |
|     and cathinones ........................... LEVEL 4 DRUG FELONY        |
+--------------------------------------------------------------------------+
|  FENTANYL / CARFENTANIL / BENZIMIDAZOLE OPIATE  (C.R.S. 18-18-403.5(2.5)) |
|     1 gram or less ........................... LEVEL 1 DRUG MISDEMEANOR   |
|        (4th or subsequent .................... LEVEL 4 DRUG FELONY)       |
|     more than 1 gram, not more than 4 grams .. LEVEL 4 DRUG FELONY        |
+--------------------------------------------------------------------------+

The fentanyl grading is measured by the weight of the material, compound, mixture or preparation, not by the weight of the pure fentanyl in it. A pressed counterfeit oxycodone pill weighing more than a gram in total therefore reaches the felony threshold even though the fentanyl content is measured in micrograms. Officers document total weight with packaging separated, and never field-test a suspected fentanyl compound without proper precautions.

Possession theories. Colorado recognizes actual, constructive and joint possession. Constructive possession requires knowledge of the item's presence and the ability to exercise dominion and control — mere presence in a vehicle where drugs are found is not enough, which is why officers document proximity, ownership, statements, and access.

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3. Distribution and Manufacturing — C.R.S. 18-18-405

Distribution grading rises with weight and with the schedule. Two Colorado-specific enhancements matter on patrol:

• Distribution to a minor and distribution in or near a school elevate the offense level.
• Since HB 22-1326, unlawful distribution of a fentanyl compound weighing more than 50 grams reaches the highest distribution tier, and a separate offense addresses distribution that proximately causes death.

Indicia of distribution that belong in a report: quantity inconsistent with personal use, packaging materials, scales, owe sheets, large amounts of small-denomination currency, and message traffic. A single indicator is weak; a documented cluster is what supports the charge.

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4. Marijuana: Constitutional Legalization With Criminal Edges

Colorado legalized adult-use marijuana through Amendment 64 (Colo. Const. Art. XVIII, Sec. 16). Legalization is not deregulation, and the criminal edges are exactly where patrol works.

Home cultivation. Personal cultivation is limited to six plants per adult, no more than three flowering at a time, and Colorado capped a single residential property at twelve plants regardless of how many adults live there. Cultivation above the personal thresholds escalates through misdemeanor and felony tiers, and cultivation of more than 30 plants is a felony.

Public consumption. "Openly and publicly" is the operative phrase. Consumption in a vehicle, on a sidewalk, in a park, or in a ski gondola is a drug petty offense; consumption on federal land — national forests, national parks, federal buildings — remains a federal offense regardless of Colorado law.

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5. Field Practice Reminders

1. Odor alone. Because possession is lawful for adults, the plain odor of marijuana no longer carries the weight it once did for probable cause in Colorado; officers must articulate additional indicators tying the odor to a criminal quantity, to impairment, or to an underage subject.
2. Weigh before you charge. The difference between a level 1 drug misdemeanor and a level 4 drug felony can be a single gram. Estimated weights in reports create dismissals.
3. Medical marijuana. A registry patient's card is a defense to specified quantities but does not authorize public consumption, driving impaired, or possession on federal property.
4. Hemp. Industrial hemp with delta-9 THC at or below the federal 0.3 percent threshold is not marijuana; presumptive field tests cannot distinguish it, which is why laboratory confirmation is required before a marijuana weight charge is filed.