What is required of watercraft if used in positive waters within the last 30 days?

Watercraft that have been used in positive waters within the last 30 days must be cleaned, drained, and dried to prevent the spread of Aquatic Invasive Species (AIS). This requirement is crucial because positive waters are those identified as habitats for invasive species, and any residual water, plant material, or organisms left on the watercraft can potentially introduce these invasive species to new ecosystems.

By ensuring that the watercraft is cleaned, drained, and dried, boaters are effectively removing any chance of carrying over these harmful species, helping to protect local waterways and ecosystems. This practice not only aligns with prevention efforts but also reflects responsible boating and environmental stewardship.

The other options do not align with established AIS prevention practices. Keeping watercraft in a specific lake does not address the risks associated with transportation of invasive species. Valid permits do not exempt water users from inspection requirements, as all craft must undergo inspection to prevent AIS transfer. Similarly, inspections by certified professionals are important but do not replace the fundamental requirement of cleaning, draining, and drying prior to transport.