In terms of ensuring handler safety, what is one specific requirement for respirators?

One specific requirement for respirators is that they are only needed if mentioned on the product label. This is important because the product label provides essential information about the potential hazards associated with a pesticide, as well as the protective measures required for safe handling. If the label indicates that a respirator is necessary, it signifies that there are specific airborne contaminants present that could pose a risk to the handler's health. This ensures that handlers only use respiratory protection when there is a demonstrated need based on the pesticide's properties, thereby aligning with regulatory standards and promoting effective safety measures without unnecessarily burdening workers with additional equipment when it is not needed.