Indiana Mass Gatherings — IC 16-41-22 (medical staffing at IC 16-41-22-10)[1]
Summary
Indiana Code chapter 16-41-22, a 1973 festival-era act recodified in 1993, governs any assembly of at least 5,000 people continuing or reasonably expected to continue at least 18 consecutive hours. A licence must be obtained before permitting, promoting, conducting or organising such an assembly: application goes to the municipal chief of police or county sheriff at least 60 days in advance with a $100 fee and bond, is forwarded to the local health department within one day, and the health department approves or disapproves within 15 days. IC 16-41-22-10 requires "at least one (1) physician for every ten thousand (10,000) people and at least one (1) nurse for every five thousand (5,000) people anticipated," with half of those physicians and nurses on site and the other half "readily available"; an "enclosed covered structure where treatment may be provided" containing a separately enclosed treatment room for each physician; and "at least one (1) emergency ambulance available at all times."
So what
Indiana ratios are anticipated-attendance ratios with a half-on-site, half-readily-available split, so the medical plan must document both rosters and what "readily available" means in minutes for that venue. The broad exemptions matter more than the ratios for most operators: permanent venues at no more than 250 over seating capacity, government fairs on established fairgrounds, otherwise-licensed assemblies, festivals held at least twice before 1 January 1973, and assemblies on state or federal land all fall outside the act. The licensing path runs through the sheriff or police chief plus the local health department, not the state — build the 60-day clock into contracting.