Assemblymember Cynthia Moore and Thomas Morley (Teamsters Local 631) presented Assembly Bill 414 on May 31, a bill that would require “large hybrid environment facilities” (defined as workplaces of at least 10,000 square feet with regular outdoor exposure through open loading docks or bay doors) to establish written safety plans addressing exposure to greenhouse gases, carbon monoxide and other air‑quality hazards. The proposed plans would require monitoring at least every four hours in employee work areas, recording air‑quality information in a log kept on‑site, forcing ventilation or fans when standards are exceeded and requiring loading vehicles to shut off engines except in defined exceptions (for example, refrigerated trailers).

Morley and union supporters described incidents in warehouses, convention centers and rigging work where workers experienced nausea, dizziness or fainting and said prolonged exposure can be dangerous for workers operating lifts or performing high‑risk tasks. The Nevada AFL‑CIO and other labor organizations testified in support, providing anecdotal accounts of workers feeling ill while near idling vehicles and loading docks.

Business groups and industry representatives opposed the bill or expressed serious reservations. The Vegas Chamber, Nevada Trucking Association, Nevada Resort Association, Nevada Manufacturing Association, Retail Association of Nevada and other trade groups said the statute is prescriptive and would create substantial monitoring, data‑logging and capital requirements. Industry witnesses argued existing OSHA regulation (Nevada's state plan) and adopted heat‑illness rules present a more appropriate regulatory path and said the bill’s square‑foot threshold and monitoring requirements could sweep in many operations, creating impractical obligations for employers. Trucking representatives also noted existing state anti‑idling laws and said trucks sometimes must idle to protect drivers or cargo.

Committee members asked about enforcement and prior regulatory work with OSHA. Moore said OSHA had suggested definitions and that regulators had recommended several technical edits that the sponsor incorporated; she noted that the bill excludes state agencies for fiscal reasons but that stakeholders could address state‑employee coverage later. Senator Ellison emphasized that many high‑ceiling facilities use battery‑powered lifts and kill switches to avoid engine idling; presenters said the concern remains because combustion products can accumulate near ceilings and in poorly cross‑ventilated spaces.

No committee vote on AB414 was recorded at the hearing. The sponsor said stakeholders and the committee would likely continue discussions and that a behind‑the‑bar meeting could follow.