Jefferson County, MO Public Conduct: Public Marijuana Use (2026)

425, RSMo. That cross-reference matters: Missouri's controlled-substances chapter, and the constitutional amendment it now incorporates, licenses medical marijuana patients and adults 21 and older to possess limited amounts, so someone who qualifies under state law and stays within state limits is not violating the county ordinance, while possession outside those state-authorized channels, including public consumption that exceeds licensed limits or occurs without state authorization, remains a county violation enforceable alongside any state charge. The ordinance does not distinguish public from private possession; it reaches marijuana anywhere in the unincorporated county, including on the street or in a park, making it the county's mechanism for citing public marijuana activity that falls outside the state-licensed framework. 210, which separately covers pipes, bongs, and related items used for controlled substances.