Nevada Mandatory Helmet Law is contained within Nevada Revised Statute 486.231, entitled "Protective headgear and glasses: Standards; when use required." Subsection 2 of that statute provides that drivers and passengers of motorcycles "shall wear protective headgear securely fastened on the head" in addition to protective glasses, goggles or face shields.
There are limited exceptions to this rule. For example, when a motorcycle (or trimobile) is equipped with a transparent windscreen, the driver or passenger need not wear glasses, goggles or face shields. NRS 486.231(3). Protective devices, including a helmet, are not required when the motorcycle is being driven in an authorized parade.
NRS 486.231(4). Nevada is 1 of 19 states that have a mandatory non-age or insurance related helmet law. There are only two states (Illinois and Iowa) that have no helmet law. The remaining states permit cyclists to ride without helmets depending upon their age and insurance coverage.