Colorado Group Gathering Areas — 6 CCR 1010-10 (Medical requirements at § 11.0)[1]
Summary
Colorado's state-level instrument is a short board-of-health rule adopted 16 August 1972 and effective 22 September 1972, still listed by the Colorado Secretary of State as an active permanent rule. It applies to any "group gathering area" — any place maintained, operated or used for a group gathering or assemblage, excluding established permanent places of assembly such as stadiums, arenas and fairgrounds — where a group of 25 or more persons assembles for a meeting, festival, social gathering or similar purpose that can be anticipated to exceed 10 hours. Gatherings of 25 to 500 persons are exempted from the medical provisions, so § 11.0 binds only gatherings anticipated above 500. Section 11.1 states that "[e]mergency medical services shall be provided under the supervision of a licensed physician"; § 11.2 requires an enclosed covered structure for emergency medical treatment and care; § 11.3 adequate medical supplies and medicines; § 11.4 adequate vehicles suitable for emergency use; § 11.5 telephone or radio communications. No ratios or certification levels are specified.
So what
Colorado is one of the few states whose baseline rule names a physician: any temporary-site gathering above 500 anticipated attendees must run its emergency medical services under licensed-physician supervision, so document that oversight explicitly in every Colorado event medical plan. The rule sets standards, not a state permit — no application, certificate or advance-notice provision exists — so it reaches you through county and district public health agencies, which fold these standards into their special-event permits and layer their own ordinances. Practically, the physician-supervision clause is the enforceable hook and the enclosed treatment structure is the build item.