Under what circumstances may a pesticide be applied without a license?

The application of pesticides without a license is permissible in cases of exempt products, such as certain household pest control products. These exempt products typically include a variety of over-the-counter pesticides that are designed for consumer use and have been approved by regulatory agencies as safe for non-professional application. The rationale behind this exemption is that these products are formulated to have lower toxicity and are intended for situations where untrained individuals can effectively manage pest control without needing specialized training.

Understanding this context highlights why the certification requirement is waived for these specific products: they are generally designed to be user-friendly and safe when used according to label instructions. This allows homeowners or non-professional users the convenience of purchasing and applying certain pest control measures without needing to navigate the complexities of licensing.

Other options present scenarios that do not align with the regulations governing pesticide application, making them incorrect in this context.