Nevada Outdoor Assemblies and Temporary Mass Gatherings — NRS 244.354–244.3548 (medical condition at NRS 244.3545(6)) and NAC 444.547–444.5498[1]
Summary
Nevada is a county-permit state with a state sanitation overlay. NRS 244.354 commands that the board of county commissioners of each county shall adopt an ordinance regulating and licensing outdoor assemblies, and a licence is required for an actual or reasonably anticipated assembly of 1,000 or more individuals outside permanent buildings or installations. Written application goes to the county clerk at least 60 days before the event, with copies to the sheriff, county health officer and county engineer for investigation and report, followed by a public hearing. NRS 244.3545 lists the conditions a board may impose, including item 6, "Adequate medical facilities, including doctors and supplies" — discretionary in form, with no ratios in statute. The separate state tier, NAC 444.547–444.5498 "Temporary Mass Gatherings" (effective 22 October 2003), applies at daily attendance of not fewer than 500 persons operating not less than 20 hours a day for more than three days at a site lacking permanent facilities — and its standards are sanitation-only, with no physician, nurse or ambulance standard.
So what
Nevada's medical requirements are real but county-set: the statutory hook is a discretionary licence condition for "[a]dequate medical facilities, including doctors and supplies," so the medical plan is negotiated with each county board and the relevant health district rather than read off a state ratio table. The county health officer is statutorily in the review loop, which makes that officer the person to engage first. Do not expect the state mass-gathering permit to carry medical content — the NAC tier is sanitation-only, expires at midnight on the thirtieth day of operation and is non-renewable.